伊硕,王龙,李晨,陈培元,郭丽娜
YI Shuo,WANG Long,LI Chen,CHEN Peiyuan,GUO Lina

• 1:中海油研究总院有限责任公司
• 2:中国海洋石油国际有限公司

摘要(Abstract)：

扎格罗斯盆地中部X油田渐新统—中新统Asmrai组的陆源碎屑-碳酸盐混积储层岩性复杂、非均质性和后期改造强，储层评价成为制约油气开发的瓶颈。为了规避评价参数相互交叉及人为因素对储层品质评价的影响，综合考虑影响储层质量的主要控制因素，优选混积系数、储层厚度、孔隙度、孔隙结构系数和非均质性系数等5种关键指标，运用灰色关联理论，提出储层综合定量评价标准，对混积储层进行综合评价。结果表明：Asmari组混积储层可划分为Ⅰ类储层、Ⅱ类储层、Ⅲ类储层和Ⅳ类非储层；储层分布主要受气候及海平面变化导致的薄层砂岩与碳酸盐岩交替沉积控制；古气候潮湿、陆源碎屑供给充足时，三角洲前缘水下分流河道主体发育Ⅰ类储层，河道侧翼及混积台地发育Ⅲ类储层，气候干燥、陆源碎屑供给不足时，储层发育较差，仅在台内滩随机发育Ⅱ类储层。研究成果可为X油田以及其他类似混积储层油田的开发方案调整和井位部署提供借鉴。
The terrigenous hybrid clastic-carbonate reservoirs of Oligocene-Miocene Asmari Formation in X Oilfield in central Zagros Basin has complex lithology, high heterogeneity and strong late reformation. Reservoir evaluation is a bottleneck restricting for oil and gas development. In order to avoid impacts of evaluation parameters mutual crossing and human factors on reservoir quality evaluation, considering the main control factors affecting reservoir quality, 5 key indexes including hybrid sediments coefficient, reservoir thickness, porosity, pore structure coefficient and heterogeneity coefficient are selected. Using gray correlation theory, comprehensive quantitative evaluation criteria for hybrid sediments reservoirs is put forward. The results show that hybrid sediments reservoirs of Asmari Formation are divided into Class Ⅰ reservoir, Class Ⅱ reservoir, Class Ⅲ reservoir and ClassⅣ non-reservoir.Reservoirs distribution is mainly controlled by alternating deposition of thin sandstones and carbonate rocks caused by climate and sea level changes. When the paleoclimate is humid and the supply of terrigenous clasts is sufficient, the main body of underwater distributary channel of delta front develops Class Ⅰ reservoirs, and the flanks of channel and hybrid sediments platforms develop Class Ⅲ reservoirs. When the climate is dry and the supply of terrigenous clasts is insufficient, reservoirs are poorly developed, with Class Ⅱ reservoirs developed randomly only in the intra-platform shoal. The research provides reference for development plans adjustment and well deployment in X Oilfield and other similar hybrid sediments reservoir oilfields.

关键词(KeyWords)： 混积储层;储层特征;主控因素;灰色关联理论;定量评价
hybrid sediments reservoir;reservoir characteristics;controlling factors;grey correlation theory;quantitative evaluation

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“海外重点油气田开发钻采关键技术”（2017ZX05032-004）

作者(Author): 伊硕,王龙,李晨,陈培元,郭丽娜
YI Shuo,WANG Long,LI Chen,CHEN Peiyuan,GUO Lina

DOI: 10.19597/j.issn.1000-3754.202202027

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