松辽盆地南部洼槽下白垩统泥页岩孔隙发育特征及其控制因素  

Pore development characteristics and controlling factors of Lower Cretaceous mud shale in the troughs of south Songliao Basin

作　　者：刘思琦 李晓松 李金池 LIU Siqi;LI Xiaosong;LI Jinchi(School of Geosciences,Yangtze University,Wuhan 430100,China;MOE Key Laboratory of Explo-ration Technologies for Oil and Gas Resources,Yangtze University,Wuhan 430100,China;Explora-tion and Development Research Institute of PetroChina Jilin Oilfield Company,Songyuan 138000,China;Hainan Branch of CNOOC(China)Limited,Haikou 570312,China)

机构地区：[1]长江大学地球科学学院,湖北武汉430100 [2]长江大学油气资源与勘探技术教育部重点实验室,湖北武汉430100 [3]中国石油吉林油田公司研究院,吉林松原138000 [4]中海石油(中国)有限公司海南分公司,海南海口570312

出　　处：《大庆石油地质与开发》2022年第1期23-32,共10页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“岩性地层油气藏成藏规律、关键技术及目标评价”(201705001-002)。

摘　　要：松辽盆地南部下白垩统火石岭组、沙河子组及营城组发育富有机质泥页岩,是重要的烃源岩。通过典型井岩心观察,结合扫描电镜、有机地球化学、全岩X衍射、低温氮气吸附等实验,对松辽盆地南部下白垩统泥页岩地质特征和孔隙发育特征进行了精细研究,并探讨了孔隙发育控制因素。结果表明:松辽盆地南部下白垩统泥页岩有机质丰度高,有机质类型以Ⅱ型为主,热演化程度已进入高成熟—过成熟阶段,广泛发育有机质孔隙、颗粒内孔、粒间孔隙及微裂缝;泥页岩孔隙发育受沉积环境、热演化程度、有机碳含量、黏土矿物、钠钾长石的溶蚀等多种地质因素控制。The organic-rich mud shale developed in Lower Cretaceous Huoshiling,Shahezi and Yingcheng Formations in south Songliao Basin is an important source rock.Based on typical well core observation and combined with SEM,organic geochemistry,whole-rock XRD and low-temperature nitrogen adsorption,the basic geological characteristics and pore development characteristics of Lower Cretaceous mud shale in south Songliao Basin are studied in detail,and the controlling factors of pore development are discussed.The results show that organic matter abundance in Lower Cretaceous mud shale in south Songliao Basin is high,and organic matter type is mainly Type-Ⅱ.Thermal evolution is in high-over maturity stages,and organic matter pores,intragranular pores,intergranular pores and micro-fractures are widely developed.Pore development of the mud shale is controlled by several including geological factors sedimentary environment,thermal evolution degree,organic carbon content,clay minerals and dissolution of sodium-potassium feldspar.

关 键 词：松辽盆地南部 下白垩统 泥页岩 孔隙发育特征 控制因素 

分 类 号：TE122.2[石油与天然气工程—油气勘探]