文佳涛,严皓,韩雪芳,吕坐彬,孟智强
WEN Jiatao,YAN Hao,HAN Xuefang,Lü Zuobin,MENG Zhiqiang

• 1:中海石油(中国)有限公司天津分公司

摘要(Abstract)：

JZ气田是渤海发现的一个典型的湖底扇沉积气田,湖底扇内部储层横向变化快,砂体的叠置和连通关系认识不清,给后期开发方案研究和井位部署带来了严峻挑战。在少井控制条件下,充分利用地震资料在空间上密集采样的优势,通过剖面地震相分析和平面地震属性优选对湖底扇内部砂体之间的叠置模式进行精细刻画;结合流体地震响应特征、流体替代实验和正演模拟技术对砂体之间的连通关系进行精细研究。结果表明,JZ气田在储量评价阶段认为的1个透镜状湖底扇岩性砂体其实是由2个相互独立不连通的岩性砂体相互叠置而成,其中构造低部位的1号湖底扇岩性砂体内部储层横向展布较为稳定,为有利储层发育区,开发潜力较大;构造高部位的2号湖底扇岩性砂体内部较为杂乱,连续性差,且存在着不成藏为水层的风险。研究成果为可动用储量计算、开发方案研究和井位部署提供可靠地质依据。
Gas Field JZ is a typical sublacustrine-fan sedimentary gas field discovered in Bohai Sea. Because of the rapid lateral change of the reservoir within the fan and the unclear understanding of the superposition-connectivity relationship among the sandbodies, so the serious challenges brought to the later development plan research and well location deployment. Under the condition of low number of well control, by making full use of the advantage of the dense spatial sampling of the seismic data, and moreover with the help of the section analysis of the seismic facies and optimal selection of the planar seismic attributes, the superposed mode of the sandbodies in the sublacustrine fan was finely characterized; combining with the characteristics of the fluid seismic response, fluid substitution experiment and forward modeling technique, the connectivity among the sandbodies was carefully studied. The results show that the lithologic sandbody in the lenticular-shaped sublacustrine fan in Gas Field JZ in the reserve evaluation stage is actually composed of two independent and disconnected lithologic sandbodies superposition each other. Among them, the horizontal distribution of the reservoir in No.1 sublacustrine-fan lithologic sandbody in the lower part of the structure is relatively stable, which is the favorable block for the reservoir development and has a great development potential; while No.2 lithologic sandbody in the high part of the structure is disorganized, has poor continuity and moreover there is the risk of no accumulation and being the aqueous layer.The research results can provide the reliable geological evidence for the calculation of the recoverable reserves, research of the development plan and deployment of the well location.

关键词(KeyWords)： 湖底扇;岩性砂体;地震相;地震属性;砂体叠置;连通关系;储量风险
sublacustrine fan;lithological sandbody;seismic facies;seismic attribute;sandbody superposition;connectivity;reserves risk

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“渤海油田高效开发示范工程”(2016ZX05058-001)

作者(Author): 文佳涛,严皓,韩雪芳,吕坐彬,孟智强
WEN Jiatao,YAN Hao,HAN Xuefang,Lü Zuobin,MENG Zhiqiang

DOI: 10.19597/j.issn.1000-3754.201908042

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