本文選題：川西南部地區(qū) + 沙溪廟組��； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：川西南部地區(qū)侏羅系沙溪廟組氣藏為典型的低孔低滲致密砂巖次生氣藏,是川西地區(qū)侏羅系淺層氣勘探的重要領(lǐng)域之一。通過多年的勘探,先后發(fā)現(xiàn)了蘇碼頭、白馬廟、觀音寺等多個氣藏,展示了川西南部地區(qū)沙溪廟組良好的勘探前景,因此深入研究該區(qū)沙溪廟組儲層特征及其控制因素具有重要意義。本次論文在結(jié)合前期研究成果基礎(chǔ)上,運用沉積學(xué)、礦物巖石學(xué)、儲層地質(zhì)學(xué)等相關(guān)理論及方法,對川西南部地區(qū)沙溪廟組物源特征、砂體展布特征、儲層特征及儲層發(fā)育控制因素進行分析。 研究認(rèn)為川西南部地區(qū)沙溪廟組沉積受到兩大物源影響,主要是龍門山中-南段方向的西北物源和母巖具有差異的龍門山中-北段與米倉山-大巴山共同影響的北部物源。研究區(qū)主要發(fā)育河流和三角洲沉積,其中三角洲類型是以分流河道為主體的分支河道型淺水三角洲。研究區(qū)儲層巖性主要為細(xì)�！辛５拈L石砂巖和巖屑長石砂巖,儲層物性表現(xiàn)為低孔低滲特征,儲集空間主要為殘余粒間孔和長石溶孔。儲層發(fā)育受到多種因素影響,沉積作用對儲層的影響表現(xiàn)在物源和沉積微相的差異上,儲層一般發(fā)育在長石含量高的砂巖或厚層的分流河道砂巖中；壓實作用和鈣質(zhì)膠結(jié)作用是使砂巖致密的重要原因,溶蝕作用或綠泥石環(huán)邊膠結(jié)發(fā)育的砂巖溶蝕孔隙或殘余粒間孔隙發(fā)育；構(gòu)造作用對該區(qū)儲層孔滲的改善和次生氣藏的形成具有重要意義。根據(jù)鉆井顯示、試油成果以及測井解釋成果等資料,認(rèn)識了沙溪廟組儲層分布規(guī)律。沙溪廟組儲層縱向上主要分布在沙Ⅱ段、沙Ⅲ段和沙Ⅳ段,儲層平面分布受到物源影響和沉積微相控制,主要分布在東部蘇碼頭、鹽井溝等受到北部物源影響的三角洲分流河道砂體中。 在認(rèn)識儲層特征、儲層發(fā)育控制因素和儲層分布規(guī)律基礎(chǔ)上,提出有利儲層分布區(qū)評選原則。結(jié)合現(xiàn)有鉆井和測井資料,選擇出沙溪廟組重點層段—沙Ⅱ段和沙Ⅲ段的有利儲層分布區(qū)。
[Abstract]:The Jurassic Shaximiao formation gas reservoir in the southern part of Sichuan is a typical low porosity and low permeability tight sandstone secondary gas reservoir, which is one of the important fields of Jurassic shallow gas exploration in western Sichuan. After many years of exploration, many gas reservoirs, such as Su Wharf, Bai Ma Miao, Guanyin Temple and so on, have been discovered, showing a good prospect for exploration of the Shaximiao formation in the southern part of West Sichuan. Therefore, it is of great significance to study the reservoir characteristics and controlling factors of Shaximiao formation in this area. On the basis of previous research results, this paper applies the theories and methods of sedimentology, mineralogy and petrology, reservoir geology, etc. to analyze the characteristics of source material and distribution of sand bodies in Shaximiao formation in the south of Sichuan. Reservoir characteristics and reservoir development control factors were analyzed. It is considered that the deposition of Shaximiao formation in the southern part of Sichuan is influenced by two major provenances, mainly the northwestern provenance in the direction of the mid-south segment of the Longmen Mountains and the northern provenance of the central to northern segment of Longmen Mountain and the Mecang Mountain to the Daba Mountains, which are different from the parent rocks. Rivers and deltas are mainly developed in the study area, among which the deltas are shallow-water deltas dominated by distributary channels. The reservoir lithology in the study area is mainly composed of fine to medium grain feldspar sandstone and lithic feldspar sandstone. The reservoir physical properties are characterized by low porosity and low permeability, and the reservoir space is mainly composed of residual intergranular pore and feldspar solution pore. The reservoir development is affected by many factors. The influence of sedimentation on reservoir is the difference between provenance and sedimentary microfacies, and the reservoir is generally developed in sandstone with high feldspar content or distributary channel sandstone with thick layer. Compaction and calcareous cementation are the important reasons for the densification of sandstone. The dissolution or the formation of residual intergranular pores in sandstone developed by chlorite ring-edge cementation; Tectonism is of great significance to the improvement of reservoir porosity and permeability and the formation of secondary gas reservoirs. According to the data of drilling, oil test and log interpretation, the reservoir distribution law of Shaximiao formation is recognized. The reservoir of Shaximiao formation is mainly distributed in the Shahejie 鈪，

本文編號：1822113