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文昌X油田物性主控因素定量分析及有利区预测 |
Main controlling factors of Reservoir and favorable area forecast in Wenchang X oil field |
投稿时间:2022-11-01 修订日期:2022-11-01 |
DOI: |
中文关键词: 沉积作用 成岩作用 物性特征 文昌A凹陷 有利区预测 |
英文关键词: Sedimentation Diagenesis Physical Characteristics Wenchang A sag Prediction of favorable area. |
基金项目:南海西部海上油田上产2000万方关键技术研究 |
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中文摘要: |
文昌X油田位于文昌A凹陷,目的层珠海组是典型的低渗背景下发育甜点的储层,甜点区预测已成为当前勘探开发亟待解决的问题。因此,根据常规物性、薄片分析、孔隙定量分析等分析化验结果,开展了研究区珠海组的物性研究,分析了沉积作用和成岩作用对物性分布规律的影响。并在此基础上,采用成岩数值模拟的方法,构建成岩指数ID反映成岩作用强度的大小,综合考虑成岩与沉积两大物性影响因素,建立孔隙度预测模型,进行孔隙度预测。研究结果表明:中粗砂岩物性较好,且水下分流河道根部物性较好;压实、胶结作用降低储层物性,溶蚀作用改善储集空间,其中压实作用是低渗储层形成的最主要因素。珠海组二段和珠海组三段孔隙度分布规律存在差异,但总体上有利区分布在靠近南大断裂,埋深相对较浅、成岩强度较弱、离物源较近的区域。 |
英文摘要: |
Wenchang X oil field is located in Wenchang A sag,and the target formation Zhuhai formation is a typical reservoir with low permeability,its dessert area has become an urgent problem to be solved in the current exploration and development. Therefore, based on the results of conventional physical properties, thin section analysis and quantitative pore analysis, the physical properties of the Zhuhai formation in the study area were studied, and the influence of sedimentation and diagenesis on the physical properties distribution was analyzed. And on the up basis, the diagenetic index ID is established to reflect the strength of diagenetic process by the method of diagenetic numerical simulation, and the porosity prediction model is established by considering the two main physical factors of diagenetic and sedimentary. The results show that the medium-coarse sandstone has good physical properties and the root of Underwater distributary channel has good physical properties, the compaction and cementation reduce the physical properties of the reservoir, and the dissolution improves the reservoir space, among which the physical properties compaction is the most important factor for the formation of the low permeability reservoir. The porosity distribution of Zhuhai II formation is different from that of Zhuhai III formation, but on the whole, the favorable areas are near the great south fault, the relatively shallow buried depth, the weak diagenetic strength and the near provenance. |
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