海相油气地质Issue(2)：54-63,10.DOI:10.3969/j.issn.1672-9854.2014.02.008
伊拉克艾哈代布油田白垩系生物碎屑灰岩储集层特征及主控因素
Characteristics and Controlling Factors of Cretaceous Bioclastic Limestone Reservoirs in Ahdeb Oil Field, Iraq
摘要
Abstract
The Middle-Upper Cretaceous bioclastic limestone reservoirs can be classified into two types, one with high-porosity and high-permeability and the other with high-porosity and low-permeability, in Ahdeb Oil Field located in the central and southern parts of Iraq. These reservoirs are different in sedimentary environments, reservoir spaces and pore textures as well as porosity and permeability. The high-porosity and high-permeability reservoirs usually develop in grainstone in intra-platform shoal subfacies, in which the pore spaces are commonly composed of mouldic pores, non-fabric selective dissolution pores, intragranular dissolved pores and intergranular pores. This type of reservoirs belongs to the best reservoirs with good configuration of pores and throats, and high porosity and permeability. The high porosity and low permeability reservoirs mainly develop in the low-energy micrite limestone, in which the pore spaces are commonly composed of intrafossil pores and intercrystal pores. This type of reservoirs is of poor configuration of pores and throats and very low permeability. It is shown that the reservoirs are controlled by sedimentary facies and constructive diagenesis so that the intra-platform shoal is the most favorable depositional facies and the dissolution, neomorphism and dolomitization lead to the majority of secondary porosity. Besides, the syngenetic dissolution and supergene dissolution are the keys of forming favorable reservoirs.关键词
伊拉克/艾哈代布油田/白垩系/碳酸盐岩储集层/储集层特征/溶蚀作用/主控因素Key words
Cretaceous/Carbonate reservoir/Reservoir characteristics/Dissolution/Controlling factor/Ahdeb Oil Field/Iraq分类
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韩海英,穆龙新,郭睿,赵丽敏,苏海洋..伊拉克艾哈代布油田白垩系生物碎屑灰岩储集层特征及主控因素[J].海相油气地质,2014,(2):54-63,10.基金项目
本文为中国石油天然气股份有限公司“十二五”重大科技专项“中国石油海外油气上产2亿吨开发关键技术研究”（编号：2011E-2501）部分成果 （）
