复杂断块油气藏低阻油气层成因及发育控制因素——以Muglad盆地Fula凹陷Jake South油田为例

发布时间：2018-05-09 12:25

本文选题：复杂断块油气藏 + 低阻油气层　；参考：《油气地质与采收率》2017年02期

【摘要】：Muglad盆地Fula凹陷Jake South油田的Ben1油藏和AG1油气藏均为复杂断块油气藏,分别属于复杂断块构造背景下的整装背斜油藏和层状油气藏,发育大量低阻油气层,对油、水层识别造成较大困难。为此,综合岩心、测试、测井等资料,对Jake South油田发育的复杂断块油气藏的低阻油气层成因及发育控制因素进行研究。首先,根据储层的粒度、物性、空间类型、致密程度等对研究区Ben1和AG1段分别进行储层分类,并对其中发育的低阻油气层进行定义;然后,综合利用岩心、薄片、物性、扫描电镜、X衍射等资料,明确研究区复杂断块油气藏各类型储层低阻油气层的成因;最后,对比低阻油气层与储层的分布特征,分析低阻油气层的发育控制因素。研究结果表明,低阻油气层的成因主要为高束缚水饱和度、发育导电矿物以及油气充注不足,而粘土矿物附加导电及工程因素对低阻油气层发育的影响则较小。不同复杂断块油气藏发育的不同类型储层的低阻油气层的成因存在差异,一般仅有1或2种因素起主要作用。低阻油气层的发育受沉积微相类型、储层类型以及低阻油带等因素控制。研究区下步低阻油气层的勘探开发应主要针对Ben1油藏和AG1油气藏发育的优质储层。
[Abstract]:The Ben1 reservoir and AG1 reservoir in Jake South oil field in Fula depression of Muglad basin are complex fault-block reservoirs, which belong to the whole anticline reservoir and stratified reservoir under the background of complex fault block structure, respectively. A large number of low resistivity oil and gas reservoirs are developed. It is difficult to identify the water layer. Therefore, based on the core, test and logging data, the genesis and control factors of low resistivity reservoirs in complex fault-block reservoirs developed in Jake South oilfield are studied. First of all, according to the grain size, physical properties, spatial type and density of the reservoir, the Ben1 and AG1 sections in the study area are classified, and the low-resistivity oil and gas reservoirs developed therein are defined; then, the core, thin slices, physical properties are comprehensively utilized. The data of scanning electron microscope (SEM) and X-ray diffraction are used to determine the origin of each type of reservoirs with low resistivity in complex fault block reservoirs in the study area. Finally, the distribution characteristics of low resistivity reservoirs and reservoirs are compared, and the development and control factors of low resistivity reservoirs are analyzed. The results show that the formation of low resistivity oil and gas reservoir is mainly due to high irreducible water saturation, the development of conductive minerals and oil and gas filling is insufficient, while the influence of clay mineral additional conductivity and engineering factors on the development of low resistivity oil and gas reservoir is relatively small. There are differences in the genesis of low resistivity reservoirs in different types of reservoirs developed in different complex fault blocks, and generally only one or two factors play a major role. The development of low resistivity reservoirs is controlled by sedimentary microfacies, reservoir types and low resistivity oil zones. The exploration and development of the next step low resistivity oil and gas reservoirs in the study area should be mainly aimed at the high quality reservoirs developed in the Ben1 reservoir and the AG1 reservoir.
【作者单位】：中国石油勘探开发研究院;中国石油塔里木油田分公司;中国石油浙江油田分公司;
【基金】：国家科技重大专项“复杂油气藏精细表征与剩余油分布预测”(2011ZX05009-003)
【分类号】：P618.13

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