本文關(guān)鍵詞： 王窯南 延安組 儲層特征 孔隙結(jié)構(gòu) 成巖作用　出處：《東北石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：王窯南地區(qū)位于鄂爾多斯盆地伊陜斜坡帶中南部,即安塞--延安一帶。研究目的層延安組是一套陸源碎屑沉積,延8~10是主要的油層。截至目前,本區(qū)的勘探程度仍然較低。進行儲層精細研究,查明延安組的沉積微相及砂體展布特征的關(guān)系,在此基礎(chǔ)上開展儲層預(yù)測,對該油田今后的有效開采具有重要指導(dǎo)意義。本論文綜合各井取心段,鑄體薄片分析,電鏡掃描以及X光衍射和分井段測井曲線解釋及評價等資料,詳細研究了王窯南地區(qū)延安組儲層的性質(zhì)以及平面展布。研究結(jié)果表明延8~10油層組砂巖儲層巖石類型主要為巖屑石英砂巖,長石石英砂巖,這些巖石經(jīng)歷了壓實、膠結(jié)、溶解等作用,成巖作用處于早成巖至晚成巖A期;巖石成分成熟度中等偏高,結(jié)構(gòu)成熟度中等;顆粒分選較好,圓度以次棱角~次圓狀為主,孔隙類型以原生粒間孔、次生孔隙為主。母巖性質(zhì),沉積微相,壓實作用,膠結(jié)作用,不穩(wěn)定組分的蝕變作用,交代作用,溶解作用均對儲層性能有重要影響。其中壓實作用和膠結(jié)作用破壞了砂巖的原生孔隙結(jié)構(gòu);而溶解作用以及不穩(wěn)定組分的蝕變作用形成了次生孔隙,改善了砂巖的孔隙結(jié)構(gòu)。將研究區(qū)儲層分為四大類,則延安組延8~10油層組砂巖儲層多為Ⅱ類、Ⅲ類儲層,其沉積微相為水上分流河道、水下分流河道、河口壩、席狀砂等,優(yōu)質(zhì)含油儲集體多出現(xiàn)在席狀砂或分支河道發(fā)育部位。
[Abstract]:The Wangyonan area is located in the central and southern part of the Yishan slope belt in the Ordos Basin, that is, the Ansai-Yan'an area. The Yanan formation is a set of continental clastic deposits, and Yan8yao 10 is the main reservoir. The degree of exploration in this area is still low. The relationship between sedimentary microfacies and sand distribution characteristics of Yan'an formation is found out through fine reservoir study, and reservoir prediction is carried out on this basis. This paper synthesizes the data of coring section, casting thin section analysis, scanning electron microscope, X-ray diffraction and well logging curve interpretation and evaluation. The properties and plane distribution of Yan'an formation reservoir in Wangyaonan area are studied in detail. The results show that the sandstone reservoir rock types of Yan 810 reservoir are mainly lithic quartz sandstone and feldspar quartz sandstone, which have experienced compaction and cementation. The diagenesis is in the A stage from early diagenesis to late diagenesis; the composition maturity of rock is on the high side and the structure maturity is medium; the granulation is better, the roundness is mainly subangular to subcircular, and the pore type is primary intergranular pore. Secondary porosity dominated. Parent rock properties, sedimentary microfacies, compaction, cementation, alteration of unstable components, metasomatism, Among them, compaction and cementation destroy the primary pore structure of sandstone, while dissolution and alteration of unstable components form secondary pores. The pore structure of sandstone has been improved. The reservoir in the study area is divided into four categories. The sandstone reservoir of Yan'an formation Yan8yun10 reservoir is mostly of class 鈪，

本文編號：1551169