孔隙型碳酸盐岩储集层分类及主控因素:以伊拉克西古尔纳油田Mishrif组为例

发布时间：2018-03-28 18:23

本文选题：孔隙型碳酸盐岩　切入点：储集层分类　出处：《地质科技情报》2017年03期

【摘要】：通过岩心、薄片和压汞等资料的综合分析,划分并研究了伊拉克西古尔纳油田白垩系Mishrif组孔隙型碳酸盐岩储集层类型及特征,并从层序地层、沉积相和成岩作用角度分析了储层的主控因素和分布特点。研究结果表明:研究区储集层可以划分为高孔高渗型、高孔中渗型、高孔低渗型、中孔低渗型和低孔低渗型5种类型。由高孔高渗型到低孔低渗型储层中值压力和排驱压力依次升高,物性逐渐变差。储层类型受到层序地层、沉积相和成岩作用的控制。海侵体系域和早期高位体系域以低渗储层为主,最大海泛面时期发育低孔低渗型储层,晚期高位体系域发育高孔高渗型储层;开阔陆棚相多发育高孔低渗型储层,台地前缘斜坡相和开阔台地相发育中孔低渗型储层,台地边缘礁滩相能量高,发育高孔高渗型储层,局限台地相发育低孔低渗型储层;溶蚀作用对储层物性影响最大,从高孔高渗型储层到低孔低渗型储层,溶蚀作用逐渐减弱,孔渗性逐渐变差。
[Abstract]:Based on the comprehensive analysis of core, thin slice and mercury injection data, the types and characteristics of porous carbonate reservoirs of Cretaceous Mishrif formation in West Gulna Oilfield, Iraq, are classified and studied. The main controlling factors and distribution characteristics of reservoir are analyzed from sedimentary facies and diagenesis angle. The results show that the reservoir in the study area can be divided into high porosity and high permeability type, high porosity and medium permeability type, high porosity and low permeability type. From high porosity and high permeability to low porosity and low permeability, the median pressure and displacement pressure of middle porosity and low permeability reservoir increase in turn, the physical properties become worse gradually, and the reservoir type is subjected to sequence stratigraphy. Control of sedimentary facies and diagenesis. Transgressive system tracts and early high system tracts are dominated by low permeability reservoirs, low porosity and low permeability reservoirs are developed during the maximum flooding period, and high porosity and high permeability reservoirs are developed in late high level system tracts. High porosity and low permeability reservoirs are developed in open shelf facies, middle porosity and low permeability reservoirs are developed in front slope facies and open platform facies, high pore and high permeability reservoirs are developed in platform edge reef and beach facies, and low porosity and low permeability reservoirs are developed in limited platform facies. From high porosity and high permeability reservoir to low porosity and low permeability reservoir, the dissolution gradually weakens and the porosity becomes worse.
【作者单位】：中国石油勘探开发研究院;中国石油天然气勘探开发公司;
【基金】：中国石油天然气股份有限公司重大科技专项“中东地区碳酸盐岩油藏整体优化部署及提高采收率技术研究与应用”(11.2011E-2501.X.01)
【分类号】：P618.13

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