伊拉克鲁迈拉油田Mishrif组碳酸盐岩储层特征及成因

doi:10.7623/syxb201305005

石油学报 ›› 2013, Vol. 34 ›› Issue (5): 843-852.DOI: 10.7623/syxb201305005

伊拉克鲁迈拉油田Mishrif组碳酸盐岩储层特征及成因

高计县^1,2, 田昌炳², 张为民², 宋新民^2,3, 刘波^2,3

1. 北京大学地球与空间科学学院北京 100871;
2. 中国石油勘探开发研究院北京 100083;
3. 北京大学石油与天然气研究中心北京 100871

收稿日期:2013-03-01 修回日期:2013-05-23 出版日期:2013-09-25 发布日期:2013-08-01
通讯作者: 刘波,男,1965年4月生,1986年获成都地质学院学士学位,1997年获北京大学博士学位,现为北京大学石油与天然气研究中心副主任、研究员,主要从事盆地构造-沉积演化、储层沉积学、层序地层学、碳酸盐岩沉积-成岩作用研究。Email:bobliu@pku.edu.cn
作者简介:高计县,男,1984年10月生,2008年毕业于中国矿业大学(北京)地质工程专业,现为北京大学与中国石油勘探开发研究院联合培养博士研究生,主要从事碳酸盐岩储层相关研究工作。Email:jxgao1002@pku.edu.cn
基金资助:
中国石油天然气股份有限公司重大科技专项(11.2011E-2501.X.01)和中国石油勘探开发研究院课题(2012Y-033)资助。

Characteristics and genesis of carbonate reservoir of the Mishrif Formation in the Rumaila oil field, Iraq

GAO Jixian^1,2, TIAN Changbing², ZHANG Weimin², SONG Xinmin^2,3, LIU Bo^2,3

1. School of Earth & Space Sciences, Peking University, Beijing 100871, China;
2. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
3. Oil & Gas Research Center, Peking University, Beijing 100871, China

Received:2013-03-01 Revised:2013-05-23 Online:2013-09-25 Published:2013-08-01

摘要/Abstract

摘要：

Mishrif组碳酸盐岩岩石类型主要有泥晶灰岩、生屑泥晶灰岩、泥晶生屑灰岩、生屑灰岩和白云质灰岩。储集空间为粒间(溶)孔、铸模孔、晶间孔、微孔、溶蚀缝和压溶缝。沉积环境属于碳酸盐缓坡,发育潟湖、滩后、生屑滩、生物礁、滩前和浅水陆棚6种沉积亚相。储层层间和层内非均质性严重。成岩作用主要有泥晶化作用、准同生期胶结作用、重结晶作用、溶蚀作用、埋藏期胶结作用、压实压溶作用和白云石化作用。三级相对海平面变化影响下的相带迁移是造成层间非均质性的主要因素,五级和六级相对海平面变化影响下的差异溶蚀和差异胶结作用是控制层内非均质性的主要原因,微裂缝的存在改善了局部储层的物性。

关键词: 碳酸盐岩储层, 沉积相, 成岩作用, 非均质性, Mishrif组, 鲁迈拉油田

Abstract:

The carbonate reservoir rocks of the Mishrif Formation in the Rumaila oil field, are mainly composed of cryptite, bioclastic wackstone, bioclastic grainstone, bioclastic limestone and dolomitic limestone with various cavities, such as intergranular (dissolved) pores, mould pores, intercrystal pores, micropores, dissolution fractures and pressure-solution fractures, The Mishrif Formation develops mainly in a carbonate ramp sedimentary environment and its main subfacies include lagoon, back-shoal, bioclastc shoal, bioherm, fore-shoal and shallow shelf. There exist severe heterogeneities in interlayers and inner layers of the reservoir. The main diagenesis types in the Mishrif Formation include micritization, penecontemporaneous cementation, recrystallization, dissolution, buried cementation, compaction-pressolution and dolomitization. The interlayer heterogeneity is mainly controlled by facies migration affected by the third-order relative sea-level change. While the main factors controlling the innerlayer heterogeneity are the differential dissolution and cementation influenced by the fifth-or sixth-order relative sea-level change. Micro-fractures dominated by tectonism can increase local porosity and permeability.

Key words: carbonate reservoir, sedimentary facies, diagenesis, heterogeneity, Mishrif Formation, Rumaila oil field

中图分类号:

TE112.221

高计县, 田昌炳, 张为民, 宋新民, 刘波. 伊拉克鲁迈拉油田Mishrif组碳酸盐岩储层特征及成因[J]. 石油学报, 2013, 34(5): 843-852.

GAO Jixian, TIAN Changbing, ZHANG Weimin, SONG Xinmin, LIU Bo. Characteristics and genesis of carbonate reservoir of the Mishrif Formation in the Rumaila oil field, Iraq[J]. Editorial office of ACTA PETROLEI SINICA, 2013, 34(5): 843-852.

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伊拉克鲁迈拉油田Mishrif组碳酸盐岩储层特征及成因

Characteristics and genesis of carbonate reservoir of the Mishrif Formation in the Rumaila oil field, Iraq

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