本文選題：松遼盆地 + 雙遼斷陷��； 參考：《吉林大學(xué)》2017年碩士論文

【摘要】：雙遼斷陷位于松遼盆地東南隆起區(qū)東部斷陷帶的西南部。斷陷面積約1233km2,地層最大厚度可達(dá)3680m。斷陷期發(fā)育地層主要為火石嶺組、沙河子組和營(yíng)城組,研究相對(duì)薄弱。針對(duì)這一問(wèn)題,本次通過(guò)對(duì)前期資料的廣泛搜集,以鉆井、巖心及測(cè)試分析為基礎(chǔ),利用地震資料解釋,分析斷陷結(jié)構(gòu)及其演化特征,識(shí)別目的層位地震相,并根據(jù)井震對(duì)比建立研究區(qū)地震相與巖相的對(duì)應(yīng)關(guān)系;同時(shí),通過(guò)測(cè)井、地震、巖心和測(cè)試數(shù)據(jù)綜合研究,確立雙遼斷陷巖相展布,明確斷陷的生儲(chǔ)蓋條件,剖析油氣地質(zhì)特征及成藏主控因素,并開(kāi)展有利勘探區(qū)帶預(yù)測(cè)。通過(guò)單井相分析,結(jié)合地震資料解釋可知,雙遼斷陷火石嶺-營(yíng)城組發(fā)育有一定規(guī)模的陸源碎屑巖和火山巖,共識(shí)別出湖泊相、扇三角洲相、湖底扇相、近岸水下扇相及火山巖相5種巖相類(lèi)型,并在此基礎(chǔ)上進(jìn)一步識(shí)別出了7種亞相和12種微相。另?yè)?jù)地震反射特征的“振幅+連續(xù)性+反射結(jié)構(gòu)+外形”參數(shù)組合,在研究區(qū)識(shí)別出16種地震相型,建立了巖相與地震相的對(duì)應(yīng)關(guān)系;并進(jìn)一步揭示了火石嶺組發(fā)育時(shí)期,研究區(qū)物源主要來(lái)自于斷陷的西部和西北部,且發(fā)育淺湖—扇三角洲—近岸水下扇—火山巖相建造體系;沙河子組時(shí)期研究區(qū)物源主要來(lái)自于西部和東南部,發(fā)育半深湖—扇三角洲—近岸水下扇—湖底扇建造體系;而營(yíng)城組時(shí)期研究區(qū)物源主要來(lái)自于西部、西北部和東南部,發(fā)育為淺湖—扇三角洲—近岸水下扇—湖底扇—火山巖相建造體系。根據(jù)研究區(qū)巖心測(cè)試分析得出,沙河子組烴源巖有機(jī)質(zhì)類(lèi)型較好,并處于成熟演化階段,是研究區(qū)的主要烴源巖;營(yíng)城組次之,火石嶺組受樣品數(shù)量及品質(zhì)限制,初步認(rèn)為生烴能力最差。儲(chǔ)集物性方面,研究區(qū)儲(chǔ)層分為兩大類(lèi),碎屑巖儲(chǔ)集層主要分布在營(yíng)城組和沙河子組,以特低孔、低滲為主;火山巖儲(chǔ)集層主要發(fā)育在火石嶺組,且孔隙度以Ⅲ-Ⅳ-Ⅴ類(lèi)為主,滲透率以Ⅴ類(lèi)為主。綜合分析得出,研究區(qū)主要發(fā)育上生下儲(chǔ)和自生自?xún)?chǔ)兩種生儲(chǔ)蓋組合類(lèi)型。根據(jù)研究區(qū)鉆井試油結(jié)果,結(jié)合測(cè)井、地震等資料分析得出,研究區(qū)氣藏(含油)主要發(fā)育于火石嶺組的火山穹隆構(gòu)造中,為火山穹隆構(gòu)造—巖性氣藏。其成藏主控因素包括有利的油氣源供給、有利的儲(chǔ)集相帶發(fā)育、有利的生儲(chǔ)蓋組合以及成藏因素有利時(shí)空配置4方面;據(jù)此預(yù)測(cè),火山穹窿構(gòu)造發(fā)育且與沙河子組及營(yíng)城組烴源巖構(gòu)成有利時(shí)空配置的雙遼次凸,是今后油氣勘探的有利目標(biāo)區(qū)。
[Abstract]:Shuangliao fault depression is located in the southwest of the eastern fault depression in the southeast uplift area of Songliao Basin. The area of fault subsidence is about 1233km2, and the maximum thickness of strata can reach 3680m. In the faulted period, the main strata are the Huoshiling formation, the Shahezi formation and the Yingcheng formation, and the study is relatively weak. In order to solve this problem, based on drilling, core and test analysis and seismic data interpretation, fault subsidence structure and its evolution characteristics are analyzed, and the seismic facies of target horizon are identified. The relationship between seismic facies and lithofacies in the study area is established according to well seismic correlation, meanwhile, through comprehensive study of logging, seismic, core and test data, the distribution of lithofacies in Shuangliao fault depression is established, and the conditions of formation, reservoir and cover of fault depression are determined. The geological characteristics of oil and gas and the main controlling factors of oil and gas accumulation are analyzed, and the favorable exploration zone prediction is carried out. Through single well facies analysis and seismic data interpretation, it can be seen that there are some scale continental clastic rocks and volcanic rocks developed in Huoshiling Yingcheng formation of Shuangliao fault depression, and the lacustrine facies, fan delta facies and sublacustrine fan facies are identified. There are 5 lithofacies types of subaqueous fan facies and volcanic facies, and on this basis, 7 subfacies and 12 microfacies are further identified. In addition, according to the "amplitude continuous reflection structure shape" parameter combination of seismic reflection characteristics, 16 types of seismic facies are identified in the study area, the corresponding relationship between lithofacies and seismic facies is established, and the developing period of Huosiling formation is further revealed. The provenance of the study area mainly comes from the west and northwest of the fault depression, and develops the shallow lacustrine fan delta nearshore subaqueous fan volcanic facies formation system, and the material source of the study area in the Shahezi formation period mainly comes from the west and the southeast. The semi-deep lacustrine fan delta near-shore subaqueous fan and sublacustrine fan formation system are developed, and the material sources of the study area in Yingcheng formation are mainly from the west, northwest and southeast. It is a shallow lacustrine fan delta sublacustrine fan volcanic facies system. According to the core test and analysis in the study area, the source rock of Shahezi formation is of good organic matter type and is in the mature evolution stage, which is the main source rock of the study area, the Yingcheng formation is the second, and the Huosiling formation is restricted by the quantity and quality of the sample. It is preliminarily considered that hydrocarbon generating ability is the worst. In terms of reservoir physical properties, the reservoirs in the study area can be divided into two categories: the clastic rock reservoirs are mainly distributed in Yingcheng formation and Shahezi formation, with very low porosity and low permeability, and volcanic rock reservoirs are mainly developed in the Huosiling formation. The porosity is mainly 鈪，

本文編號(hào)：1951088