滨南油田滨三区火成岩油气成藏条件及勘探潜力分析

Hydrocarbon Accumulation Conditions and Exploration Potential of Igneous Rock in the Third Development Zone of Binnan Oilfield

摘要: 滨南油田滨三区火成岩勘探近年来陷入瓶颈，依托于高精度三维地震，积极开展特殊岩性油气藏勘探势在必行。基于地震及钻、测、录井资料综合分析，滨三区主要发育溢流相火成岩，溢流相火成岩主要发育三种模式：单一期次火成岩、多期次火成岩、大套火成岩，在地震剖面上具有不同的地震相特征；结合正演及地球物理属性分析，在详细刻画火成岩发育范围的基础上，精细描述了4个不同期次12个火成岩岩性体。前期勘探重点着重于落实滨三区火成岩构造圈闭的含油气性，已上报的火成岩探明储量主要为构造、构造–岩性油气藏；依托于新出站的高精度滨三区开发地震，精细油藏解剖，发现B338-13井已证实了火成岩岩性油气藏的勘探潜力；火成岩岩性油气藏储量规模估算1050万吨，是该区下一步增储上产的有利阵地。

Abstract: Igneous rock exploration in binsan area of Binnan oilfield has fallen into a bottleneck in recent years. Relying on high-precision three-dimensional seismic, it is imperative to actively carry out exploration of special lithologic reservoirs. Through comprehensive analysis of drilling, logging and seismic data, the type of igneous rock is mainly overflow igneous rock in binsan area. Three modes are developed, i.e., single stage sub igneous rock, multiphase igneous rocks, and massive igneous rock in the study area, which has different features of seismic facies. Combined with forward modeling and geophysical attribute analysis, based on the detailed description of the development range of igneous rocks, 12 igneous rock lithologic bodies in 4 different periods are described in detail. In early exploration, drilling igneous structural traps for hydrocarbon detection is the focus of the work. The reported proven reserves of igneous rocks are mainly structural reservoirs and structural-lithologic reservoirs. Relying on the high precision development seismic data and applying reservoir analysis, the result shows that the exploration potential of igneous lithologic reservoirs had been confirmed with production of B338-13 well. The lithologic reservoir of igneous rock is the advantageous area of increasing reserves and oil production in the next step, which has been estimated to be about 10.5 million tons.