近源湖盆砂砾岩储层次生溶孔成因探讨——以查干凹陷祥6井区为例
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摘要
查干凹陷祥6井区砂砾岩储层发育蜂窝状次生溶蚀孔隙。通过对岩石薄片、阴极发光薄片及扫描电镜分析,结果表明,该孔隙主要由钙长石颗粒及碳酸盐胶结物溶蚀形成,少量长英质岩屑及石英颗粒边缘也有溶蚀迹象。荧光薄片及包裹体测温证实存在两期胶结作用,结合研究区热演化史研究结果,成岩演化规律与该湖盆主要发育的两期生烃历史、两期构造抬升剥蚀相对应。主要的成岩演化序列:压实作用为主(初次深埋)→长石颗粒大量溶蚀,少量石英次生加大,局部成藏(初次生烃)→第一期胶结(第一期构造抬升剥蚀)→第一期胶结物溶蚀,蜂窝状次生溶孔发育,局部成藏(再次深埋,二次生烃)→第二期胶结物胶结,少量石英质颗粒溶蚀(第二期构造抬升剥蚀)。
The honeycomb-like secondary dissolved pores are well developed in Xiang 6well area in one side of Maoxi fault in Chagan depression.Based on thin sections,SEM,and casting thin sectionsdata,the secondary pores formed mainly due to dissolution of anorthite particles and carbonate cement as well as some felsic rock debris and quartz granule.Fluorescence chip and inclusion temperature verified the existence of two stages of cementations.Combining with the evolution of reservoir,we found that the diagenetic evolution corresponded to two hydrocarbon generations and two uplift denudations.The key diagenetic evolution sequences is as follows,Compaction(the first deep burial)-dissolution of a great deal of feldspar particles,little quartz overgrowth and partly accumulation(the first hydrocarbon generation)-the first cementation(the first uplift denudation)-dissolution of the first cement,development of honeycomb-like secondary dissolved pores and partly accumulation(the second deep burial and the second hydrocarbon generation)-the second cementation and dissolution of some quartz particles.
The honeycomb-like secondary dissolved pores are well developed in Xiang 6well area in one side of Maoxi fault in Chagan depression.Based on thin sections,SEM,and casting thin sectionsdata,the secondary pores formed mainly due to dissolution of anorthite particles and carbonate cement as well as some felsic rock debris and quartz granule.Fluorescence chip and inclusion temperature verified the existence of two stages of cementations.Combining with the evolution of reservoir,we found that the diagenetic evolution corresponded to two hydrocarbon generations and two uplift denudations.The key diagenetic evolution sequences is as follows,Compaction(the first deep burial)-dissolution of a great deal of feldspar particles,little quartz overgrowth and partly accumulation(the first hydrocarbon generation)-the first cementation(the first uplift denudation)-dissolution of the first cement,development of honeycomb-like secondary dissolved pores and partly accumulation(the second deep burial and the second hydrocarbon generation)-the second cementation and dissolution of some quartz particles.
引文
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[16]张创,孙卫,高辉,等.鄂尔多斯盆地华池长8储层成岩相与孔隙度演化[J].地球科学:中国地质大学学报,2014,39(4):411-419.Zhang Chuang,Sun Wei,Gao Hui,et al.Reservoir Diagenetic Facies and Porosity Evolution Pathways of Chang 8Formation in Huachi,Ordos Basin[J].Earth Science:Journal of China University of Geosciences,2014,39(4):411-419.
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[18]赵健,童晓光,肖坤叶,等.乍得Bongor盆地储层沉积成岩特征及其主控因素[J].吉林大学学报(地球科学版),2013,43(3):649-658.Zhao Jian,Tong Xiaoguang,Xiao Kunye,et al.Sedimentary-Diagenetic Characteristics of Reservoir Sandstone and Their Controlling Factors in Bongor Basin,Chad[J].Journal of Jilin University(Earth Science Edition),2013,43(3):649-658.
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[21]王艳忠,操应长,葸克来.次生孔隙发育带的概念及石油地质意义新认识[J].吉林大学学报(地球科学版),2013,43(3):659-668.Wang Yanzhong,Cao Yingchang,Xi Kelai.New View on the Concept of Secondary Pore Developing Zones and Its Significance of Petroleum Geology[J].Journal of Jilin University(Earth Science Edition),2013,43(3):659-668.
[22]王新民,郭彦如,马龙,等.银额盆地侏罗、白垩系油气超系统特征及其勘探方向[J].地球科学进展,2001,16(4):490-495.Wang Xinmin,Guo Yanru,Ma Long,et al.Yin’e Basin:Characters of Jurassic and Cretaceous Petroleum Supersystem and Prospecting Area[J].Advance in Earth Sciences,2001,16(4):490-495.
[23]李汶国,张晓鹏,钟玉梅.长石砂岩次生溶孔的形成机理[J].石油与天然气地质,2005,2(26):220-229.Li Wenguo,Zhang Xiaopeng,Zhong Yumei.Formation Mechanism of Secondary Dissolved Pores in Arcose[J].Oil&Gas Geology,2005,2(26):220-229.
[24]贾珍臻,林承焰,任丽华,等.苏德尔特油田低渗透凝灰质砂岩成岩作用及储层质量差异性演化[J].吉林大学学报(地球科学版),2016,46(6):1624-1636.Jia Zhenzhen,Lin Chengyan,Ren Lihua,et al.Diagenesis and Reservoir Quality Evolution of Low Permeability Tuffaceous Sandstones in Suderte Oilfield[J].Journal of Jilin University(Earth Science Edition),2016,46(6):1624-1636.
[2]张晶,李双文,王书香,等.歧南斜坡深层成岩演化与次生孔隙形成机制[J].中国矿业大学学报,2014,43(6):1070-1077.Zhang Jing,Li Shuangwen,Wang Shuxiang,et al.Deep Diagenetic Evolution and Formation Mechanisms of Secondary Porosity in Qinan Ramp,Qikou Sag[J].Journal of China University of Mining&Technology,2014,43(6):1070-1077.
[3]赵彦彦,郑永飞.碳酸盐沉积物的成岩作用[J].岩石学报,2011,27(2):501-518.Zhao Yanyan,Zheng Yongfei.Diagenesis of Carbonate Sediments[J].Acta Petrologica Sinica,2011,27(2):501-518.
[4]李杪,罗静兰,赵会涛,等.不同岩性的成岩演化对致密砂岩储层储集性能的影响:以鄂尔多斯盆地东部上古生界盒8段天然气储层为例[J].西北大学学报(自然科学版),2015,45(1):97-106.Li Miao,Luo Jinglan,Zhao Huitao,et al.Impact of the Diagenetic Evolution of Different Lithology on Tight Sandstone Reservoir Performance:A Case Study from He 8Natural Gas Reservoir of the Upper Paleozoic in Eastern Ordos Basin[J].Journal of Northwest University(Natural Science Edition),2015,45(1):97-106.
[5]罗静兰,邵红梅,杨艳芳,等.松辽盆地深层火山岩储层的埋藏—烃类充注—成岩时空演化过程[J].地学前缘,2013,20(5):175-187.Luo Jinglan,Shao Hongmei,Yang Yanfang,et al.Temporal and Spatial Evolution of Burial-Hydrocarbon Filling-Diagenetic Process of Deep Volcanic Reservoir in Songliao Basin[J].Earth Science Frontiers,2013,20(5):175-187.
[6]张云峰,王国强,付宝利,等.长岭断陷深层碎屑岩储层成岩作用及异常高孔带成因[J].吉林大学学报(地球科学版),2011,41(2):372-376.Zhang Yunfeng,Wang Guoqiang,Fu Baoli,et al.The Diagenesis and the Origin of Abnormal High Porosity Zone in the Deep Clastic Reservoir in Changling Fault Depression[J].Journal of Jilin University(Earth Science Edition),2011,41(2):372-376.
[7]蒋庆平,李德敏,罗洋,等.东濮凹陷桥口构造沙三段储层成岩作用与孔隙演化[J].新疆地质,2008,26(4):382-385.Jiang Qingping,Li Demin,Luo Yang,et al.Diagenesis and Porosity Evolution of the Reservoir of the Member3of Shahejie Formation in Qiaokou Area in Dongpu Sag[J].Xinjiang Geology,2008,26(4):382-385.
[8]宁宁,陈孟晋,刘锐娥,等.鄂尔多斯盆地东部上古生界石英砂岩储层成岩及孔隙演化[J].天然气地球科学,2007,18(3):334-338.Ning Ning,Chen Mengjin,Liu Ruie,et al.Upper Paleozoic Quartz-Sandstone Reservoir Diagenesis and Pore Evoletion,Eastern Ordos Basin[J].Natural Gas Geoscience,2007,18(3):334-338.
[9]柳蓉,杨小红,董清水,等.罗子沟盆地有机质热演化对砂岩物性的改造作用[J].吉林大学学报(地球科学版),2014,44(2):460-468.Liu Rong,Yang Xiaohong,Dong Qingshui,et al.Effect of Organic Thermal Evolution on Physical Characteristics of Sandstone in Luozigou Basin[J].Journal of Jilin University(Earth Science Edition),2014,44(2):460-468.
[10]蒋恕,蔡东升,朱筱敏,等.辽河坳陷辽中凹陷成岩作用与中深层孔隙演化[J].石油与天然气地质,2007,28(3):362-369.Jiang Shu,Cai Dongsheng,Zhu Xiaomin,et al.Diagenesis of Liaozhong Sag in Liaohe Ddepression and Pore Evolution in Its Middle-Deep Strata[J].Oil and Gas Geology,2007,28(3):362-369.
[11]郭长敏,施振生.歧口凹陷沙一段砂岩成岩作用及孔隙演化[J].岩性油气藏,2009,21(1):31-39.Guo Changmin,Shi Zhensheng.Diagenesis and Pore Evolution of the First Member of Shahejie Formation in Qikou Sag[J].Lithologic Reservoirs,2009,21(1):31-39.
[12]敬国超,毕生,陈建民.双河油田核三段砂岩储集层的孔隙演化研究[J].成都理工学院学报,2001,28(3):292-296.Jing Guochao,Bi Sheng,Chen Jianmin.Research on Pore Evolution of the Paleogene Sandstone Reservoir in the Shuanghe Oil Field[J].Journal of Chendu Universtiy of Technoligy,2001,28(3):292-296.
[13]邵红梅,刘招君,王成,等.松辽盆地北部深层砂岩成岩作用与孔隙演化[J].世界地质,2005,24(1):58-62.Shao Hongmei,Liu Zhaojun,Wang Cheng,et al.Diagenesis and Pore Evolution of Deep Sandstone in North of Songliao Basin[J].Global Geology,2005,24(1):58-62.
[14]郭建华,朱锐,周小康.塔河地区西南缘东河砂岩的成岩作用与孔隙演化[J].中南大学学报(自然科学版),2006,37(3):572-578.Guo Jianhua,Zhu Rui,Zhou Xiaokang.Diagenesis and Porosity Evolution of Donghe Sandstone in Southwest of Tahe Area[J].Journal of Center South University(Science and Techology),2006,37(3):572-578.
[15]李士祥,胡明毅,李浮萍.川西前陆盆地上三叠统须家河组砂岩成岩作用及孔隙演化[J].天然气地球科学,2007,18(4):535-539.Li Shixiang,Hu Mingyi,Li Fuping.Diagenesis and Porosity Evolution of Upper Triassic Xujiahe Formation Sandstone in Western Sichuan Foreland Basin[J].Natural Gas Geoscience,2007,18(4):535-539.
[16]张创,孙卫,高辉,等.鄂尔多斯盆地华池长8储层成岩相与孔隙度演化[J].地球科学:中国地质大学学报,2014,39(4):411-419.Zhang Chuang,Sun Wei,Gao Hui,et al.Reservoir Diagenetic Facies and Porosity Evolution Pathways of Chang 8Formation in Huachi,Ordos Basin[J].Earth Science:Journal of China University of Geosciences,2014,39(4):411-419.
[17]薛永超,程林松.白豹油田长8油藏成岩储集相[J].吉林大学学报(地球科学版),2011,41(2):365-371.Xue Yongchao,Cheng Linsong.The Diagenetic Reservoir Facies of Chang 8 Reservoir in Baibao Oilfield[J].Journal of Jilin University(Earth Science Edition),2011,41(2):365-371.
[18]赵健,童晓光,肖坤叶,等.乍得Bongor盆地储层沉积成岩特征及其主控因素[J].吉林大学学报(地球科学版),2013,43(3):649-658.Zhao Jian,Tong Xiaoguang,Xiao Kunye,et al.Sedimentary-Diagenetic Characteristics of Reservoir Sandstone and Their Controlling Factors in Bongor Basin,Chad[J].Journal of Jilin University(Earth Science Edition),2013,43(3):649-658.
[19]高辉,孙卫.鄂尔多斯盆地合水地区长8储层成岩作用与有利成岩相带[J].吉林大学学报(地球科学版),2010,40(3):542-548.Gao Hui,Sun Wei.Diagenesis and Faorable Diagenetic Facies of Chang 8 Reservoir in Heshui Area,Ordos Basin[J].Journal of Jilin University(Earth Science Edition),2010,40(3):542-548.
[20]国殿斌,李聪,李忠,等.查干凹陷早白垩世碎屑岩储层成岩作用及孔隙演化[J].地质科学,2014,49(4):1258-1268.Guo Dianbin,Li Cong,Li Zhong,et al.Diagenesis and Evolution of Pores in Clastic Rock Reservoir of Early Cretaceous in Chagan Sag[J].Chinese Journal of Geology,2014,49(4):1258-1268.
[21]王艳忠,操应长,葸克来.次生孔隙发育带的概念及石油地质意义新认识[J].吉林大学学报(地球科学版),2013,43(3):659-668.Wang Yanzhong,Cao Yingchang,Xi Kelai.New View on the Concept of Secondary Pore Developing Zones and Its Significance of Petroleum Geology[J].Journal of Jilin University(Earth Science Edition),2013,43(3):659-668.
[22]王新民,郭彦如,马龙,等.银额盆地侏罗、白垩系油气超系统特征及其勘探方向[J].地球科学进展,2001,16(4):490-495.Wang Xinmin,Guo Yanru,Ma Long,et al.Yin’e Basin:Characters of Jurassic and Cretaceous Petroleum Supersystem and Prospecting Area[J].Advance in Earth Sciences,2001,16(4):490-495.
[23]李汶国,张晓鹏,钟玉梅.长石砂岩次生溶孔的形成机理[J].石油与天然气地质,2005,2(26):220-229.Li Wenguo,Zhang Xiaopeng,Zhong Yumei.Formation Mechanism of Secondary Dissolved Pores in Arcose[J].Oil&Gas Geology,2005,2(26):220-229.
[24]贾珍臻,林承焰,任丽华,等.苏德尔特油田低渗透凝灰质砂岩成岩作用及储层质量差异性演化[J].吉林大学学报(地球科学版),2016,46(6):1624-1636.Jia Zhenzhen,Lin Chengyan,Ren Lihua,et al.Diagenesis and Reservoir Quality Evolution of Low Permeability Tuffaceous Sandstones in Suderte Oilfield[J].Journal of Jilin University(Earth Science Edition),2016,46(6):1624-1636.