南黄海崂山隆起二叠系砂岩储层特征及其油气勘探前景  

Characteristics and hydrocarbon prospects of the Permian sandstone reservoirs of the Laoshan Uplift, South Yellow Sea

作　　者：袁勇 陈建文[1,2] 梁杰 张银国[1,2] 薛路 吴淑玉[1,2] 蓝天宇 吴飘 YUAN Yong;CHEN Jianwen;LIANG Jie;ZHANG Yinguo;XUE Lu;WU Shuyu;LAN Tianyu;WU Piao(Qingdao Institute of Marine Geology,China Geological Survey,Qingdao 266237,China;Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China;College of Oceanography,Hohai University,Nanjing 210098,China;College of Marine Geosciences,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国地质调查局青岛海洋地质研究所,青岛266237 [2]青岛海洋科学与技术试点国家实验室海洋矿产资源评价与探测技术功能实验室,青岛266237 [3]河海大学海洋学院,南京210098 [4]中国海洋大学海洋地球科学学院,青岛266100

出　　处：《海洋地质与第四纪地质》2021年第5期181-193,共13页Marine Geology & Quaternary Geology

基　　金：山东省自然科学基金资助项目“南黄海盆地崂山隆起上二叠统特低渗砂岩致密层储层表征研究”(ZR2020QD038),“南黄海盆地崂山隆起石炭系油气保存条件的主控因素分析”(ZR2020MD071);国家自然科学基金面上基金“南黄海崂山隆起二叠系储层油气成藏破坏与流体演化过程还原研究”(42076220);山东省博士后创新基金“南黄海盆地二叠系上统相震约束储层表征研究”(201602004);中国地质调查局项目“崂山隆起构造沉积条件地质调查”(DD20190818),“南黄海油气资源调查”(DD20160152),“海岸带和大陆架地质演化调查与评价”(DD20160147)。

摘　　要：南黄海崂山隆起二叠系发育典型致密砂岩,具备"源储互层"、"油气近源聚集"的成藏条件,具有较大的油气资源潜力。基于崂山隆起内唯一钻井CSDP-2井,通过物性实验、铸体薄片、阴极发光、X-射线衍射、流体包裹体鉴定等分析测试方法,结合地震储层预测,研究了崂山隆起二叠系砂岩储层特征、分布规律及主控因素。结果显示,崂山隆起二叠系砂岩储层致密,成岩演化复杂,超低孔、超低渗,但裂缝发育,属于致密改造型储层;该储层具有"横向相控、垂向叠置、裂缝连通"的分布特点;储层物性及空间展布受控于沉积环境、成岩作用和构造事件的复合作用;崂山隆起二叠系具有两期油气充注,砂岩储层经历了致密储集体的形成、裂缝化改造两个过程。研究认为,崂山隆起二叠系油气资源前景较好,寻找保存条件较好的储层发育区是该区未来油气勘探的重点方向。The tight sandstone reservoirs of Permian are well developed on the Laoshan Uplift of the South Yellow Sea, where the reservoirs are interbedded with source rocks and have excellent conditions for near-source hydrocarbon accumulation. Based on the borehole of CSDP-2 recently drilled on the Laoshan Uplift, the characteristics, distribution patterns and the main controlling factors of the reservoirs are comprehensively studied by this paper with the data from seismic reservoir prediction and laboratory testing, which includes reservoir properties, casting thin sections, scanning electron microscopy, x-ray diffraction, fluid inclusion, et al. The results suggest that the Permian sandstone reservoirs belong to the kind of tight reworked reservoir, which have suffered strong compaction and complex diagenetic evolution and are characterized by extremely low porosity and permeability. However, fractures are well developed. The distribution of the reservoirs is controlled by three factors: sedimentary facies change laterally, source rock overlapping vertically, and fracture connection internally. Reservoir properties and their spatial distribution are jointly controlled by sedimentary environment, diagenesis and tectonic events. There are two periods of hydrocarbon charging in Permian on the Laoshan Uplift and the sandstone reservoir has experienced two major processes: the formation of tight reservoirs and fracture transformation. According to this research, the Permian of the Laoshan Uplift has great exploration prospect, and future exploration should focus more on reservoirs with better preservation conditions.

关 键 词：致密砂岩储层 储层地震预测 储层主控因素 二叠系 崂山隆起 

分 类 号：P744[天文地球—海洋科学]