本文選題：川西南 + 巖石力學(xué)參數(shù)　； 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：資陽(yáng)-東峰場(chǎng)區(qū)塊位于川西南構(gòu)造較高部位,是有利的油氣聚集區(qū)帶,是中石化西南局增儲(chǔ)上產(chǎn)的重要目標(biāo)區(qū)塊,油氣勘探開(kāi)發(fā)潛力大;但是資陽(yáng)-東峰場(chǎng)區(qū)塊作為勘探開(kāi)發(fā)的新區(qū)快,還缺少系統(tǒng)的工程地質(zhì)研究成果,缺乏設(shè)計(jì)和施工的科學(xué)依據(jù),也嚴(yán)重威脅到增儲(chǔ)上產(chǎn)和安全高效生產(chǎn)目標(biāo)的實(shí)現(xiàn)。此外,前期在東峰2、東峰3、東峰6井對(duì)須家河組氣藏進(jìn)行儲(chǔ)層改造,改造后大部分地層產(chǎn)水,三口井均未取得理想增產(chǎn)效果。而巖石的力學(xué)參數(shù)是石油鉆井、壓裂工程設(shè)計(jì)、構(gòu)造應(yīng)力場(chǎng)計(jì)算及裂縫預(yù)測(cè)的基礎(chǔ)資料。地層中裂縫的發(fā)育以及油田工程中的諸多問(wèn)題均與巖石的力學(xué)性質(zhì)密切相關(guān)。因此,對(duì)該區(qū)塊開(kāi)展巖石力學(xué)參數(shù)的應(yīng)用研究具有重要的現(xiàn)實(shí)和經(jīng)濟(jì)意義。鑒于巖石力學(xué)參數(shù)的重要應(yīng)用價(jià)值以及資陽(yáng)-東峰場(chǎng)區(qū)塊的勘探開(kāi)發(fā)實(shí)際情況的需要,本論文采用室內(nèi)實(shí)驗(yàn)與測(cè)井資料分析二者結(jié)合的方法,主要針對(duì)資陽(yáng)-東峰場(chǎng)區(qū)塊的陸相地層(以須家河組地層為研究的重點(diǎn)目標(biāo)),以該地區(qū)的區(qū)域地質(zhì)資料為基礎(chǔ),收集整理了6口井(川7井、川峰188井、東峰2井、東峰3井、東峰6井、資陽(yáng)1井)的常規(guī)測(cè)井、成像測(cè)井、錄井、鉆井、壓裂數(shù)據(jù)等資料,通過(guò)大量巖心實(shí)驗(yàn),得到了巖石的密度、彈性模量、泊松比、抗張強(qiáng)度、抗壓強(qiáng)度、內(nèi)聚力和內(nèi)摩擦角等巖石力學(xué)參數(shù),明確了儲(chǔ)層敏感性特征;結(jié)合測(cè)井資料,建立了巖石力學(xué)參數(shù)預(yù)測(cè)模型,建立了該地區(qū)巖石力學(xué)參數(shù)剖面,分析了力學(xué)參數(shù)分布規(guī)律;根據(jù)欠壓實(shí)理論,優(yōu)選運(yùn)用了伊頓法,建立了聲波、密度、電阻率測(cè)井資料地層壓力預(yù)測(cè)模型和剖面,落實(shí)了地層壓力縱向分布規(guī)律;在此基礎(chǔ)上,運(yùn)用聲發(fā)射、差應(yīng)變實(shí)驗(yàn)、礦場(chǎng)資料確定了地應(yīng)力大小和方向,建立了陸相地層坍塌壓力、破裂壓力剖面,運(yùn)用GMI地應(yīng)力建模軟件的GMI-Wellcheck(即鉆井設(shè)計(jì)和井筒穩(wěn)定性分析)模塊得到三壓力剖面,分析了井壁穩(wěn)定性;最后在工程地質(zhì)參數(shù)研究基礎(chǔ)上,討論了鉆完井過(guò)程中安全鉆井液密度窗口的確定,欠平衡鉆井的可行性,射孔方位的選擇,鉆井液性能的優(yōu)化,鉆頭的選型,以及儲(chǔ)層改造過(guò)程中縫網(wǎng)的形成條件,優(yōu)化研究壓裂液的優(yōu)化和壓裂工藝的優(yōu)選等內(nèi)容。最終提出了適合于該地區(qū)鉆井、完井以及儲(chǔ)層改造方面的技術(shù)對(duì)策和優(yōu)化設(shè)計(jì)方案。通過(guò)本論文研究表明:室內(nèi)實(shí)驗(yàn)測(cè)定的巖石力學(xué)參數(shù)和測(cè)井資料得出的巖石力學(xué)參數(shù)具有較好的相關(guān)性,依據(jù)本論文的研究方法得到的預(yù)測(cè)結(jié)果完全可以滿(mǎn)足工程施工的需要;須家河組地層壓力存在分區(qū)差異,東部川峰188井區(qū)壓力較低(1.2MPa/100m),北部東峰3井區(qū)相對(duì)較高(1.5MPa/100m);研究區(qū)陸相巖石強(qiáng)度隨深度增加趨勢(shì)明顯,自流井上部、須四底部及須三中部地層巖石強(qiáng)度明顯大于其它地層,相同層段砂巖強(qiáng)度約是泥頁(yè)巖強(qiáng)度2倍;研究區(qū)最大水平主應(yīng)力方向主要為近東西向,須家河組方位在106°±10°范圍;對(duì)于天然裂縫不發(fā)育儲(chǔ)層,建議采用光套管注入方式施工,應(yīng)盡量提高施工排量,增加縫內(nèi)凈壓力。結(jié)合本論文在鉆井液性能優(yōu)化和鉆頭選型的研究成果,將欠平衡鉆井應(yīng)用到該工區(qū)的鉆井施工中,鉆井速度提高了0.1~0.3m/h;在后期通過(guò)儲(chǔ)層改造參數(shù)的優(yōu)化,獲得了較高的產(chǎn)量。
[Abstract]:The Ziyang Dongfeng field block is located in the southwest of Sichuan Province, which is a favorable zone of oil and gas accumulation. It is an important target area for the Southwest Bureau of Sinopec to increase its storage and production. The potential of oil and gas exploration and development is great, but the Ziyang East peak field block is fast in the new area of exploration and development, and lacks systematic engineering geological research results and lacks of the design and construction section. In addition, in the earlier period, the reservoir of the Xujiahe group gas reservoir was reformed in Dongfeng 2, Dongfeng 3, Dongfeng 6 well, and most of the strata produced water after the transformation, and all three wells had not achieved the ideal increase effect. The mechanical parameters of the rock were oil drilling, fracturing engineering design and construction. The basic data of force field calculation and fracture prediction. The development of cracks in the formation and many problems in the oilfield engineering are closely related to the mechanical properties of rock. Therefore, the application of rock mechanics parameters to this block is of great practical and economic significance. In view of the important application value of rock mechanics parameters and Ziyang East, In this paper, the method of combining indoor experiments and logging data analysis is adopted in this paper, which mainly aims at the continental strata of the Ziyang Dongfeng field block (the key target of the Xujiahe formation). Based on the regional geological data in this area, 6 wells (7 wells in Sichuan, Sichuan peak 188) have been collected and arranged. Well, Dongfeng 2, Dongfeng 3, Dongfeng 6, Ziyang 1 well) conventional logging, imaging logging, logging, drilling, fracturing data and other data, through a large number of core experiments, the rock density, modulus of elasticity, Poisson's ratio, tensile strength, compressive strength, cohesive force and internal friction angle, etc. Well data, the rock mechanics parameter prediction model is established, the rock mechanics parameter section of this area is established, and the distribution law of mechanical parameters is analyzed. According to the theory of under compaction, Eaton method is used to establish the model and section of the prediction of formation pressure in acoustic, density and resistivity logging data, and the vertical distribution law of formation pressure is carried out. On the basis of acoustic emission, differential strain test and field data, the size and direction of ground stress are determined. The collapse pressure and fracture pressure profile of the continental strata are established. The three pressure profile is obtained by using the GMI-Wellcheck (the drilling design and the wellbore stability analysis) module of the GMI geostress modeling software, and the stability of the wellbore is analyzed. Finally, the engineering ground is made. On the basis of the study of the quality parameters, the determination of the density window of the safe drilling fluid during drilling and completion, the feasibility of underbalanced drilling, the selection of the perforation azimuth, the optimization of the drilling fluid performance, the selection of the drill bit, the formation conditions of the seam net in the process of reservoir reconstruction, optimization of the fracturing fluid and the optimization of the fracturing technology are discussed. The technical countermeasures and optimal design schemes for drilling, completion and reservoir reconstruction in this area are proposed. Through this paper, it is shown that the rock mechanics parameters measured by the laboratory test and the rock mechanics parameters obtained by the logging data have good correlation, and the prediction results obtained by this method are completely possible. In order to meet the needs of engineering construction, the formation pressure of the Xujiahe formation is different, the East Sichuan peak 188 well area pressure is low (1.2MPa/100m), the North East peak 3 well area is relatively high (1.5MPa/100m); the strength of the continental rock in the study area increases with the depth obviously, the upper part of the self flow well, the rock strength of the four bottom and the third middle part of the Xujiahe is obviously greater than that of the other The strength of sandstone in the formation and the same layer is about 2 times the strength of shale; the main direction of the maximum horizontal principal stress in the study area is mainly near east-west, and the azimuth of Xujiahe formation is in the range of 106 + 10 degrees; for the undeveloped reservoirs with natural fractures, the construction of the light casing injection method is suggested, and the construction displacement and net pressure should be increased as far as possible. The research results of well fluid performance optimization and drill bit selection have applied underbalanced drilling to the drilling construction in this area, and the drilling speed increased by 0.1~0.3m/h, and higher production was obtained by optimizing the parameters of reservoir reconstruction in the later period.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P618.13

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相關(guān)期刊論文 前1條

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本文編號(hào)：1983687