| 鄂尔多斯盆地苏77、召51区块山23段储层成岩作用与孔隙演化定量分析 |
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| 引用本文： | 王晓晨,罗静兰,李文厚,王若谷,唐启银.鄂尔多斯盆地苏77、召51区块山23段储层成岩作用与孔隙演化定量分析[J].现代地质,2017,31(3):565. |
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| 作者姓名： | 王晓晨 罗静兰 李文厚 王若谷 唐启银 |
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| 作者单位： | 1西北大学地质学系 大陆动力学国家重点实验室，陕西 西安710069；
2陕西延长石油(集团) 有限责任公司 研究院，陕西 西安710075；3中国石油青海油田分公司 采油二厂，甘肃 敦煌736202 |
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| 基金项目： | 国家自然科学重点基金项目(41330315)；中国地质调查局地质调查计划项目(12120114009201)。 |
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| 摘 要： | 利用扫描电镜、岩石薄片、高压压汞、X衍射等实验及物性分析资料，对鄂尔多斯盆地苏77、召51区块山23段储层基本特征、成岩作用类型及强度、孔隙演化模式进行研究。结果表明：储层主要岩石类型为成分成熟度较高、结构成熟度较低的石英砂岩和岩屑石英砂岩；孔隙类型以溶孔为主，残余粒间孔和晶间孔含量次之。储层在经历中等-强程度的压实，中等程度的胶结以及强烈的溶蚀作用后，处于中成岩阶段B期，局部处于晚成岩阶段。压实作用和胶结作用导致原生孔隙遭到破坏，孔隙度损失分别为1694％和1429％，晶间孔和溶蚀作用分别使孔隙度增加092％和564％，储层物性得以改善。孔隙空间经历原生孔隙减少→次生孔隙发育→次生孔隙减少→混合孔隙并存的复杂演化过程。
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| 关 键 词： | 苏77—召51区块 山23段 成岩作用 孔隙演化 |
Diagenesis Characteristics and Quantitative Analysis of Porosity Evolution of Reservoir of Shan_2~3 Formation in Su77-Zhao51 Well Region,Ordos Basin |
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| WANG Xiaochen,LUO Jinglan,LI Wenhou,WANG Ruogu,TANG Qiyin.Diagenesis Characteristics and Quantitative Analysis of Porosity Evolution of Reservoir of Shan_2~3 Formation in Su77-Zhao51 Well Region,Ordos Basin[J].Geoscience——Journal of Graduate School,China University of Geosciences,2017,31(3):565. |
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| Authors: | WANG Xiaochen LUO Jinglan LI Wenhou WANG Ruogu TANG Qiyin |
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| Institution: | 1Department of Geology, Northwest University, State Key Laboratory of Continental Dynamics, Xian，Shaanxi710069,China;
2Research Institute of Yanchang Petroleum(Group)Co.Ltd, Xian，Shaanxi710075,China;
3The Second Oil Recovery Plant of Qinghai Oilfield Branch,PetroChina, Dunhuang,Gansu736202,China |
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| Abstract: | Taking advantage of the experiment of scanning electron microscopy,the casting thin section,high pressure Hg injection,X ray diffraction and physical properties,this paper have studied the reservoir essential characteristics,including diagenesis types and intensity,porosity evolution of Shan23 Formation in Su77 Zhao51 well region in the Ordos Basin.The results show that there are mainly two rock types,iequartz sandstone and lithic quartz sandstone,both of which have high compositional maturity and low structural maturity.In addition, the pore type is mainly dissolution pore,while the residual intergranular pore and intercrystalline pore take the second place.After undergoing moderate strong degree compaction,moderate cementation and strong dissolution,the reservoir is now in the phase B of the middle diagenetic stage,part of which is in the late diagenetic stage.The compaction and cementation result in destroying primary pores,leading to the loss of porosity by 1694% and 1429%, respectively.The intercrystalline pore and dissolution make porosity increase by 092% and 564% so that the reservoir property is improved.The pore space experienced a complex evolutionary process:reduction of primary pore→development of secondary pore→reduction of secondary pore→coexistence of mixture pore. |
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| Keywords: | Su77 Zhao51 well region Shan23 Formation diagenesis porosity evolution |
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