Diagenetic evolution and facies of reservoirs in Member 8 of Permian Xiashihezi Formation in the Z30 block of Sulige gasfield

doi:10.7623/syxb201305009

Editorial office of ACTA PETROLEI SINICA ›› 2013, Vol. 34 ›› Issue (5): 883-895.DOI: 10.7623/syxb201305009

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Diagenetic evolution and facies of reservoirs in Member 8 of Permian Xiashihezi Formation in the Z30 block of Sulige gasfield

WANG Xiuping^1,2, MU Chuanlong^2,3, GONG Yunyun¹, MA Dongxu¹

1. College of Geosciences & Engineering, Shandong University of Science & Technology, Qingdao 266590, China;
2. Key Laboratory of Sedimentary Basins & Oil-Gas Resources, Ministry of Land & Resources, Chengdu 610081, China;
3. Chengdu Institute of Geology & Mineral Resources, China Geological Survey, Chengdu 610081, China

Received:2013-01-20 Revised:2013-03-25 Online:2013-09-25 Published:2013-08-01

苏里格气田Z30区块下石盒子组8段储层成岩演化与成岩相

王秀平^1,2, 牟传龙^2,3, 贡云云¹, 马东旭¹

1. 山东科技大学地质科学与工程学院山东青岛 266590;
2. 国土资源部沉积盆地与油气资源重点实验室四川成都 610081;
3. 中国地质调查局成都地质调查中心四川成都 610081

通讯作者: 牟传龙,男,1965年1月生,1984年毕业于成都地质学院,现为中国地质调查局成都地质调查中心研究员、博士生导师,主要从事沉积地质学及油气地质学研究。Email:cdmchuanlong@163.com
作者简介:王秀平,女,1988年5月生,2010年获山东科技大学学士学位,2012年获山东科技大学硕士学位,现为山东科技大学博士研究生,主要从事沉积和储层方面的研究。Email:wangxiuping198805@126.com

Abstract

Abstract:

Based on microscopic observations, fluid inclusions and thermodynamic analyses of various diagenetic reactions in acidic and alkaline fluid media, and combined with evolutionary history of organic matter and burial history, diagenetic evolution and facies of reservoirs in Member 8 of Xiashihezi Formation in the Z30 block of Sulige Gasfield were classified. The result showed that the Member 8 of Xiashihezi Formation reservoirs experienced at least four evolutionary stages of diagenesis, namely the syndiagenetic to early Period A of Early Diagenesis weak-acid corrosion stage, the late Period A to Period B of Early Diagenesis acid corrosion stage, the Period A to early Period B of Middle Diagenesis acid dissolution stage, and finally the late Period B of Middle Diagenesis to epigenetic alkaline metasomatism and cementation stage. The epigenetic stage emerged during the uplift of the study area. After the diagenetic evolution, five types of diagenetic facies were formed in this area, i.e, unstable component dissolution—chlorite film facies of arenite, unstable component dissolution—kaolinite and siliceous cementation facies of arenite, kaolinite and siliceous cementation—unstable component dissolution facies of arenite, unstable component dissolution—carbonate dense cementation facies of arenite, and miscellaneous matrix-filled dense compaction facies of greywacke. The acid dissolution stage is a critical period for the formation of main reservoir space, which makes the unstable component dissolution—chlorite film facies of arenite, the unstable component dissolution—kaolinite and siliceous cementation facies of arenite and the kaolinite and siliceous cementation—unstable component dissolution facies of arenite as the constructive diagentic facies of reservoirs.

Key words: Sulige Gasfield, Permian, Xiashihezi Formation, diagenesis, diagenetic evolution, diagenetic facies

摘要：

通过镜下、成岩流体包裹体以及酸、碱性流体介质中各种成岩反应热力学特征的分析,结合有机质演化史、埋藏史,对苏里格气田Z30区块二叠系下石盒子组8段(简称盒8段)储层的成岩演化和成岩相进行了划分。结果表明,盒8段储层经历了同生成岩—早成岩A早期的弱酸性溶蚀阶段、早成岩A晚期—早成岩B期的酸性溶蚀阶段、中成岩A期—中成岩B早期的酸性溶解阶段以及中成岩B晚期—地层抬升过程中成岩后生的碱性交代和胶结4个成岩演化阶段,最终形成5种成岩相类型,即净砂岩不稳定组分溶蚀—绿泥石薄膜相、净砂岩不稳定组分溶蚀—高岭石及硅质胶结相、净砂岩高岭石及硅质胶结—不稳定组分溶蚀相、净砂岩不稳定组分溶蚀—碳酸盐致密胶结相以及杂砂岩杂基充填致密压实相。其中,酸性溶解阶段是形成储层主要储集空间的关键性阶段,并使净砂岩不稳定组分溶蚀—绿泥石薄膜相、净砂岩不稳定组分溶蚀—高岭石及硅质胶结相和净砂岩高岭石及硅质胶结—不稳定组分溶蚀相成为建设性成岩相。

关键词: 苏里格气田, 二叠系, 下石盒子组, 成岩作用, 成岩演化, 成岩相

CLC Number:

TE112.23

WANG Xiuping, MU Chuanlong, GONG Yunyun, MA Dongxu. Diagenetic evolution and facies of reservoirs in Member 8 of Permian Xiashihezi Formation in the Z30 block of Sulige gasfield[J]. Editorial office of ACTA PETROLEI SINICA, 2013, 34(5): 883-895.

王秀平, 牟传龙, 贡云云, 马东旭. 苏里格气田Z30区块下石盒子组8段储层成岩演化与成岩相[J]. 石油学报, 2013, 34(5): 883-895.

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Diagenetic evolution and facies of reservoirs in Member 8 of Permian Xiashihezi Formation in the Z30 block of Sulige gasfield

苏里格气田Z30区块下石盒子组8段储层成岩演化与成岩相

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