Relationship between authigenic clay mineral and dessert reservoir—A case study in Weixinan Sag and Wenchang A Sag
LOU Min1, YANG Xianghua2, YAO Guangqing2, JIANG Ping3
1. Shanghai Branch of CNOOC Ltd, Shanghai 200335, China; 2. Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China; 3. Zhanjiang Branch of CNOOC Ltd, Zhanjiang 524057, China
Abstract：Clay mineral is an important part of cement in clastic rock reservoir and its type and content have great influence on the quality of the reservoir. Based on the research of thin section, cathodoluminescence, mercury intrusion data, SEM, X-ray diffraction, physical properties and other data, the authors analyzed the clay minerals in Weixinan Sag and Wenchang A Sag. The results show that the dessert reservoir is closely related to the clay mineral, and two clay mineral assemblages of relatively high-quality reservoir are developed in low permeability background. The dessert reservoir of Liushagang Formation in Weixinan Sag are mostly developed in medium coarse sandstone and gravel bearing coarse sandstone. The activity of acid fluid and dissolution in the reservoir is strong. The relative content of kaolinite is high, and the pore types are mainly dissolution pores and intergranular pores. There are two genesis kinds of kaolinite, which are the leaching of atmospheric fresh water and dissolution of organic acid respectively. The high-quality reservoir of Zhuhai Formation in Wenchang A Sag is mainly located in the front of fan delta, and the deposit is transformed by paroxysmal water flow and sea water. The relative content of chlorite is high, and the pore type is mainly residual intergranular pore. The main types of chlorite are granular coating and pore lining, supplemented by cluster chlorite filled between grains. The analysis of the relationship between clay mineral and dessert reservoir is of great significance to the dessert finding and oil and gas exploration.
娄敏, 杨香华, 姚光庆, 姜平. 自生黏土矿物与甜点储层的关系——以涠西南凹陷和文昌A凹陷为例[J]. 中国地质调查, 2021, 8(1): 13-23.
LOU Min, YANG Xianghua, YAO Guangqing, JIANG Ping. Relationship between authigenic clay mineral and dessert reservoir—A case study in Weixinan Sag and Wenchang A Sag. , 2021, 8(1): 13-23.
[1] 汤艳杰,贾建业,谢先德.黏土矿物的环境意义[J].地学前缘,2002,9(2):337-344. Tang Y J,Jia J Y,Xie X D.Environment significance of clay minerals[J].Earth Science Frontiers,2002,9(2):337-344. [2] 徐守立,尤丽,李才,等.文昌A凹陷10区珠海组低渗储层孔喉结构特征[J].东北石油大学学报,2016,40(5):55-62. Xu S L,You L,Li C,et al.Characterization of pore-throat structure in low-permeability reservoir from Zhuhai Formation of 10 area in Wenchang A sag[J].Journal of Northeast Petroleum University,2016,40(5):55-62. [3] 高凌,张明伟,严恒,等.涠西南凹陷涠洲10-A油田及围区流三段储层特征及控制因素[J].中国矿业,2017,26(9):156-163,168. Gao L,Zhang M W,Yan H,et al.Reservoir characteristics and control factors of member 3 of the Liushagang Formation,WZ10-A oilfield and surrounding areas,Weixinan sag[J].China Mining Magazine,2017,26(9):156-163. [4] 谢玉洪. 南海西部低渗油气藏勘探开发探索与实践[J].中国海上油气,2018,30(6):80-85. Xie Y H.Exploration and practice of low permeability reservoirs exploration and development in western South China Sea[J].China Offshore Oil and Gas,2018,30(6):80-85. [5] 娄敏,杨香华,姚光庆,等.涠西南凹陷流三段储层成岩相分析与甜点储层预测[J].海洋地质与第四纪地质,2020,40(3):171-184. Lou M,Yang X H,Yao G Q,et al.Diagenetic facies analysis and sweet point reservoir prediction for the 3rd Member of Liushagang Formation in the Weixinan Sag[J].Marine Geology & Quaternary Geology,2020,40(3):171-184. [6] 胡宗全,朱筱敏.准噶尔盆地西北缘侏罗系储层成岩作用及孔隙演化[J].石油大学学报:自然科学版,2002,26(3):16-19. Hu Z Q,Zhu X M.Diageneses and pore evolution of Jurassic reservoir in Northwestern edge of Junggar basin[J].Journal of University of Petroleum,2002,26(3):16-19. [7] 顾家裕,何斌.塔里木盆地轮南地区三叠系扇三角洲沉积与储集层研究[J].沉积学报,1994,12(2):54-62. Gu J Y,He B.Study on Triassic fan delta sedimentary and reservoir in Lunnan area,Tarim Basin[J].Acta Sedimentologica Sinica,1994,12(2):54-62. [8] 娄敏,杨香华,姚光庆,等.乌石凹陷流沙港组高岭石的分布特征、影响因素及演化[J].石油地质与工程,2020,34(3):30-35. Lou M,Yang X H,Yao G Q,et al.Distribution and evolution of kaolinite and its influencing factors in the reservoir of Liushagang Formation of Wushi Sag[J].Petroleum Geology and Engineering,2020,34(3):30-35. [9] Salman Bloch,Robert H L,Linda B.Anomalously high porosity and permeability in deeply buried sandstone reservoirs:Origin and predictability[J].AAPG Bulletin,2002,86(2):301-328. [10] 马鹏杰,林承焰,张世奇,等.碎屑岩储集层中绿泥石包膜的研究现状[J].古地理学报,2017,19(1):147-159. Ma P J,Lin C Y,Zhang S Q,et al.An overview on study of chlorite films in clastic reservoirs[J].Journal of Palaeogeography,2017,19(1):147-159. [11] 程超,朱文娟,廖恒杰,等.西湖凹陷某构造低渗储层成岩演化研究[J].中国地质调查,2018,5(4):33-39. Chen C,Zhu W J,Liao H J,et al.Diagenetic evolution research on low permeability reservoirs of one structure in Xihu Sag[J].Geological Survey of China,2018,5(4):33-39. [12] 孙小龙,林承焰,董春梅,等.储层岩性控制下的绿泥石对硅质胶结的影响[J].地球科学,2017,42(9):1599-1607. Sun X L,Ling C Y,Dong C M,et al.Influence of chlorite on siliceous cement under control of reservoir lithology[J].Earth Science,2017,42(9):1599-1607. [13] 刘亚鹏,文华国,黄建良,等.准噶尔盆地阜北地区头屯河组砂岩自生绿泥石特征[J].成都理工大学学报:自然科学版,2016,43(4):487-496. Liu Y P,Wen H G,Huang J L,et al.Characteristics of authigenic chlorite of Toutunhe Formation in the northern region of Fubei,Junggar Basin,China[J].Journal of Chengdu University of Technology:Science & Technology Edition,2016,43(4):487-496. [14] 张凤廉. 自生绿泥石对储层孔隙度的影响分析[J].非常规油气,2017,4(6):123-128. Zhang F L.The analysis of influence of authigenic chlorite on the reservoir porosity[J].Unconventional Oil & Gas,2017,4(6):123-128. [15] 周晓峰,焦淑静,于均民.鄂尔多斯盆地延长组砂岩中绿泥石膜的赋存状态及成因[J].矿物岩石地球化学通报,2017,36(5):834-842. Zhou X F,Jiao S J,Yu J M.Occurrences and origin of chlorite films in the Yanchang Formation sandstones,Ordos Basin[J].Bulletin of Mineralogy,Petrology and Geochemistry,2017,36(5):834-842.
2021, Vol. 8 
