大牛地氣田大47-大70井區(qū)山西組儲層特征研究
發(fā)布時間：2019-02-15 02:02
【摘要】：大牛地氣田大47-大70井區(qū)位于鄂北盆地東北部,其構(gòu)造位置在伊陜斜坡北部,是華北分公司乃至中石化的重點天然氣勘探開發(fā)區(qū)。山西組是本區(qū)的重點層位之一,但是由于其復(fù)雜的地質(zhì)條件和成巖作用,使得儲層致密,非均質(zhì)性強(qiáng),控制儲層發(fā)育的主要因素和天然氣成藏特征不明確,以上因素均阻礙氣田的進(jìn)-步開發(fā)。本次研究以石油地質(zhì)學(xué)、沉積學(xué)、儲層地質(zhì)學(xué)、測井地質(zhì)學(xué)等理論為指導(dǎo),利用巖心及其分析化驗和試氣等資料對工區(qū)沉積相特征和儲層特征等進(jìn)行分析與探討,取得了以下幾點認(rèn)識：1、運(yùn)用傳統(tǒng)沉積旋回與高分辨率層序地層學(xué)相結(jié)合的方法對研究區(qū)171口井的原有分層進(jìn)行復(fù)核,將工區(qū)山西組劃分為兩段,即山1段和山2段,山2段分為兩個砂組,即S2-2和S2-I；山1段分為三個砂組,即S1-3、S1-2和S1-1。2、物源及沉積相分析研究表明：工區(qū)山西組物源主要來自東北部,發(fā)育三角洲平原亞相,包括水上分流河道、溢岸砂、決口扇、間灣4種微相。3、巖石學(xué)特征分析研究表明：山西組主要為巖屑砂巖及巖屑質(zhì)石英砂巖,砂巖成分成熟度偏低,顆粒分選較好,磨圓度較差,以次棱-次圓為主�？紫妒侥z結(jié)是其主要的膠結(jié)類型,工區(qū)也發(fā)育一定的薄膜-孔隙式膠結(jié)。泥晶灰質(zhì)、泥質(zhì)、長英質(zhì)等構(gòu)成的雜基和白云石、硅質(zhì)、方解石、硅質(zhì)等構(gòu)成的膠結(jié)物是填隙物的主要類型。4、通過對鑄體薄片、普通薄片和掃描電鏡等資料的分析,認(rèn)為研究區(qū)主要孔隙類型為粒間孔隙、粒內(nèi)孔隙、填隙物內(nèi)孔隙、溶蝕粒內(nèi)孔隙及溶蝕裂縫孔隙等五種孔隙類型,以粒間溶蝕孔隙為主,次生粒內(nèi)溶孔為輔。喉道類型可劃分為收縮喉道、片狀喉道和微喉道,并以微喉道和片狀喉道為主。5、根據(jù)毛管壓力曲線形態(tài)和孔隙結(jié)構(gòu)參數(shù)分布情況,將研究區(qū)孔隙結(jié)構(gòu)劃分為四類,Ⅰ類為較低門檻壓力低孔低滲細(xì)喉型、Ⅱ類為低門檻壓力低孔特低滲較細(xì)喉、Ⅲ類為中門檻壓力特低孔超低滲微細(xì)喉、Ⅳ類為高門檻壓力超低孔超低滲微細(xì)喉；大牛地氣田孔隙結(jié)構(gòu)復(fù)雜,其參數(shù)變化較大,中值半徑相對偏小,排驅(qū)壓力偏高,最大進(jìn)汞飽和度高,但退汞效率低,巖石總孔隙度中有效孔隙度所占比例小,滲流能力差。6、根據(jù)研究區(qū)自生礦物分布、形成順序、包裹體測溫、有機(jī)質(zhì)成熟度、古溫度及各種成巖現(xiàn)象的分析,認(rèn)為山西組地層整體處于中成巖A階段。研究區(qū)目的層發(fā)育斑狀溶蝕孔隙膠結(jié)成巖相(一類成巖相)、碳酸鹽致密膠結(jié)成巖相(二類成巖相)、粘土致密膠結(jié)成巖相(三類成巖相)、致密壓實成巖相(四類成巖相)。研究區(qū)主力產(chǎn)層儲層成巖相總體為一、二類成巖相,三類成巖相儲層產(chǎn)能較差,四類成巖相儲層產(chǎn)能很差,基本不能形成工業(yè)氣藏。7、影響研究區(qū)儲層物性的主要因素為：沉積作用和成巖作用。沉積作用主要包括沉積微相、碎屑組分、碳酸鹽膠結(jié)物及填隙物4個方面,其中水上分流河道等微相儲層物性最好,其次為決口扇微相。碎屑組分中長石、巖屑含量與物性具有一定正相關(guān)；碳酸鹽和填隙物含量與物性呈負(fù)相關(guān)關(guān)系；成巖作用包括壓實、膠結(jié)、溶解及交代作用,其中壓實、膠結(jié)和交代作用使儲層物性變差,而溶解作用增大儲層的孔滲性。8、利用巖性、物性、電性、含氣性等標(biāo)準(zhǔn)確定有效厚度下限,山西組氣藏儲層孔隙度下限為5%,滲透率下限為0.1mD,含氣飽和度下限為45%。9、針對儲層的綜合性能,選用巖性、孔隙度、滲透率,中值半徑、排驅(qū)壓力、成巖相類型,微相類型、有效厚度、含氣飽和度和無阻流量等參數(shù)作為儲層綜合評價的特征參數(shù),對研究區(qū)儲層進(jìn)行綜合評價。將研究區(qū)的儲層綜合性能劃分為一類、二類、三類、四類。研究區(qū)目的層以三類、四類儲層為主,二類儲層次之,一類儲層相對較少。
[Abstract]:The large 47-large 70-well area of the large-scale cattle-ground gas field is located in the north-eastern part of the northern Hubei basin, and its tectonic position is in the northern part of the western Hubei Province, and it is the key natural gas exploration and development zone of the North China Branch and the Sinopec. The Shanxi Formation is one of the key horizons in this area, but due to its complicated geological conditions and diagenesis, the reservoir is dense and non-homogeneous, and the main factors of controlling the development of the reservoir and the reservoir characteristics of the natural gas are not clear, and the above factors all hinder the development of the gas field. Based on the theories of petroleum geology, sedimentology, reservoir geology, logging geology and so on, the paper analyzes and discusses the sedimentary facies and reservoir characteristics of the work area by using the core and its analysis and analysis and test gas. According to the method of combination of the traditional sedimentary cycle and the high-resolution layer sequence stratigraphy, the original layering of the 171 wells in the study area is reviewed, and the Shanxi Formation in the work area is divided into two sections, namely, the mountain 1 section and the mountain 2 section, and the mountain 2 section is divided into two sand groups, namely, S2-2 and S2-I, and the mountain 1 section is divided into three sand groups, namely, S1-3, The results of the analysis of S1-2 and S1-1.2, the source of material and the sedimentary facies show that the source of the Shanxi Formation in the work area is mainly from the north-east and the development of the sub-facies of the delta plain, including 4 kinds of micro-facies of the water distributary channel, the overflow sand, the decision-making fan and the bay bay. The Shanxi Formation is mainly rock-rock and rock-rock quartz sandstone, with low maturity of the sandstone component, good particle sorting and poor roundness, and the secondary-secondary-circle is the main. The pore-type cementation is the main cementing type, and the work area also has a certain film-pore type cementation. It is the main type of the interstitial material, and the main pore type of the study area is the inter-grain pore by the analysis of the data of the cast body, the normal sheet and the scanning electron microscope. The pores in the grains, the pores in the interstitial, the pores in the dissolved particles and the pores of the corrosion crack are the main types of pores, which are mainly dissolved in the intergranular corrosion pores, and the secondary particles are supplemented by the internal dissolution pores. the throat type can be divided into a contraction throat, a sheet-shaped throat and a micro-throat, and is mainly composed of a micro-throat and a sheet-shaped throat. The type II is low-threshold pressure, low-porosity, low-permeability, low-permeability, low-permeability, ultra-low-permeability micro-throat, type IV is the ultra-low-porosity ultra-low-permeability micro-throat with high threshold pressure, the pore structure of the large-scale gas-field gas field is complex, the parameter change is large, the middle value radius is relatively small, and the displacement pressure is high, the maximum mercury saturation is high, but the mercury removal efficiency is low, the effective porosity in the total porosity of the rock is small and the seepage capacity is poor. It is considered that the whole formation of Shanxi Formation is in the middle diagenetic A stage. The purpose of the study is to develop the plaque-like dissolution pore-cemented diagenetic facies (a kind of diagenetic facies), the carbonate-dense cemented diagenetic facies (the second-class diagenetic facies), the clay-dense cemented diagenetic facies (three types of diagenetic facies), and the compact and compact diagenetic facies (four types of diagenetic facies). The diagenetic facies of the main production layer of the research area are generally one, the second-class diagenetic facies, the three types of diagenetic facies have poor production capacity, and the four types of diagenetic facies have poor production capacity and can not form the industrial gas reservoir. It mainly includes four aspects, such as the deposition of the micro-phase, the component of the debris, the cementation of the carbonate and the interstitial matters, in which the physical properties of the micro-phase reservoirs such as the water-distributing channel and the like are the best, followed by the micro-phase of the decision-making fan. The content of feldspar and debris in the component of the debris is positively related to the physical property, and the content of the carbonate and the interstitial substance is in a negative correlation with the physical property. The diagenesis includes compaction, cementation, dissolution and cross-generation, in which the physical property of the reservoir is degraded by the action of compaction, cementation and cross-generation. and the effective thickness and lower limit are determined by using the criteria such as lithology, physical property, electrical property, gas-bearing property and the like, the lower limit of the porosity of the gas storage reservoir in the Shanxi group is 5%, the lower limit of the permeability is 0. 1mD, and the lower limit of the gas saturation is 45%. The parameters of porosity, permeability, medium value radius, displacement pressure, diagenetic facies type, micro-facies type, effective thickness, gas saturation and open flow are used as characteristic parameters of comprehensive evaluation of the reservoir, and the reservoir of the study area is comprehensively evaluated. The comprehensive performance of the reservoir in the study area can be divided into one, two, three, and four types. The target layer of the study area is divided into three types, four types of reservoirs as the main, and the second type of reservoir is of relatively small type.
【學(xué)位授予單位】：長江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13
本文編號：2422848
[Abstract]:The large 47-large 70-well area of the large-scale cattle-ground gas field is located in the north-eastern part of the northern Hubei basin, and its tectonic position is in the northern part of the western Hubei Province, and it is the key natural gas exploration and development zone of the North China Branch and the Sinopec. The Shanxi Formation is one of the key horizons in this area, but due to its complicated geological conditions and diagenesis, the reservoir is dense and non-homogeneous, and the main factors of controlling the development of the reservoir and the reservoir characteristics of the natural gas are not clear, and the above factors all hinder the development of the gas field. Based on the theories of petroleum geology, sedimentology, reservoir geology, logging geology and so on, the paper analyzes and discusses the sedimentary facies and reservoir characteristics of the work area by using the core and its analysis and analysis and test gas. According to the method of combination of the traditional sedimentary cycle and the high-resolution layer sequence stratigraphy, the original layering of the 171 wells in the study area is reviewed, and the Shanxi Formation in the work area is divided into two sections, namely, the mountain 1 section and the mountain 2 section, and the mountain 2 section is divided into two sand groups, namely, S2-2 and S2-I, and the mountain 1 section is divided into three sand groups, namely, S1-3, The results of the analysis of S1-2 and S1-1.2, the source of material and the sedimentary facies show that the source of the Shanxi Formation in the work area is mainly from the north-east and the development of the sub-facies of the delta plain, including 4 kinds of micro-facies of the water distributary channel, the overflow sand, the decision-making fan and the bay bay. The Shanxi Formation is mainly rock-rock and rock-rock quartz sandstone, with low maturity of the sandstone component, good particle sorting and poor roundness, and the secondary-secondary-circle is the main. The pore-type cementation is the main cementing type, and the work area also has a certain film-pore type cementation. It is the main type of the interstitial material, and the main pore type of the study area is the inter-grain pore by the analysis of the data of the cast body, the normal sheet and the scanning electron microscope. The pores in the grains, the pores in the interstitial, the pores in the dissolved particles and the pores of the corrosion crack are the main types of pores, which are mainly dissolved in the intergranular corrosion pores, and the secondary particles are supplemented by the internal dissolution pores. the throat type can be divided into a contraction throat, a sheet-shaped throat and a micro-throat, and is mainly composed of a micro-throat and a sheet-shaped throat. The type II is low-threshold pressure, low-porosity, low-permeability, low-permeability, low-permeability, ultra-low-permeability micro-throat, type IV is the ultra-low-porosity ultra-low-permeability micro-throat with high threshold pressure, the pore structure of the large-scale gas-field gas field is complex, the parameter change is large, the middle value radius is relatively small, and the displacement pressure is high, the maximum mercury saturation is high, but the mercury removal efficiency is low, the effective porosity in the total porosity of the rock is small and the seepage capacity is poor. It is considered that the whole formation of Shanxi Formation is in the middle diagenetic A stage. The purpose of the study is to develop the plaque-like dissolution pore-cemented diagenetic facies (a kind of diagenetic facies), the carbonate-dense cemented diagenetic facies (the second-class diagenetic facies), the clay-dense cemented diagenetic facies (three types of diagenetic facies), and the compact and compact diagenetic facies (four types of diagenetic facies). The diagenetic facies of the main production layer of the research area are generally one, the second-class diagenetic facies, the three types of diagenetic facies have poor production capacity, and the four types of diagenetic facies have poor production capacity and can not form the industrial gas reservoir. It mainly includes four aspects, such as the deposition of the micro-phase, the component of the debris, the cementation of the carbonate and the interstitial matters, in which the physical properties of the micro-phase reservoirs such as the water-distributing channel and the like are the best, followed by the micro-phase of the decision-making fan. The content of feldspar and debris in the component of the debris is positively related to the physical property, and the content of the carbonate and the interstitial substance is in a negative correlation with the physical property. The diagenesis includes compaction, cementation, dissolution and cross-generation, in which the physical property of the reservoir is degraded by the action of compaction, cementation and cross-generation. and the effective thickness and lower limit are determined by using the criteria such as lithology, physical property, electrical property, gas-bearing property and the like, the lower limit of the porosity of the gas storage reservoir in the Shanxi group is 5%, the lower limit of the permeability is 0. 1mD, and the lower limit of the gas saturation is 45%. The parameters of porosity, permeability, medium value radius, displacement pressure, diagenetic facies type, micro-facies type, effective thickness, gas saturation and open flow are used as characteristic parameters of comprehensive evaluation of the reservoir, and the reservoir of the study area is comprehensively evaluated. The comprehensive performance of the reservoir in the study area can be divided into one, two, three, and four types. The target layer of the study area is divided into three types, four types of reservoirs as the main, and the second type of reservoir is of relatively small type.
【學(xué)位授予單位】：長江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13
【參考文獻(xiàn)】
相關(guān)期刊論文 前4條
1 曹忠輝;王建淮;郭建民;;鄂爾多斯盆地大牛地氣田上古生界儲層特征[J];斷塊油氣田;2006年02期
2 許仕策，，楊少坤，黃麗芬;層序地層學(xué)在地層對比中的應(yīng)用[J];地學(xué)前緣;1995年03期
3 胡文瑞;;中國低滲透油氣的現(xiàn)狀與未來[J];中國工程科學(xué);2009年08期
4 高大成;李瑞;;測井儲層沉積相分析[J];內(nèi)蒙古石油化工;2007年08期
相關(guān)博士學(xué)位論文 前2條
1 譚晨曦;大牛地氣田上古生界沉積相及儲層研究[D];西北大學(xué);2010年
2 向丹;碎屑巖儲層物性下限研究及儲量計算[D];成都理工大學(xué);2007年
相關(guān)碩士學(xué)位論文 前1條
1 仝秀云;北部灣粘土礦物分布及其環(huán)境指示意義[D];中國地質(zhì)大學(xué)（北京）;2010年
本文編號：2422848
本文鏈接：http://sikaile.net/kejilunwen/diqiudizhi/2422848.html
最近更新
教材專著
