碳酸盐岩岩溶储渗体描述及分类评价——以高石梯磨溪灯四气藏为例

Description and Classification Evaluation of Carbonate Karst Reservoir and Seepage Body—Taking Deng4 Gas Reservoir in Gaoshiti-Moxi as an Example

摘要: 与碎屑岩储层相比，碳酸盐岩储层受沉积作用、成岩作用及构造破碎作用等影响更严重、储层更具复杂性，储层评价难度大。为了更好地描述碳酸盐岩储层，引入储渗体的概念，以高石梯磨溪灯四气藏为例，根据测井曲线特征，在单井上将储渗体划分为纵向多层复合结构储渗体和单层结构储渗体两种类型，考虑到研究区灯四段上下两套溶洞系统的分布特征，将灯四上划为一个储渗体系，灯四下为一个储渗体系。依据储渗体内储层岩溶构型及孔隙度大小，对储渗体内部进行了分类评价，明确研究区储渗体分布规律；确定研究区储渗体定量评价标准，从定性和定量两个方面开展储渗体描述及分类评价。

Abstract: Compared with clastic reservoir, carbonate reservoir is more seriously affected by sedimentation diagenesis and tectonic fracture, and the reservoir is more complicated and difficult to evaluate In order to better describe the carbonate reservoir, it introduces the concept of reservoir body, lamp with kaolinite ladder mill creek four gas reservoir as an example, according to the characteristics of the logging curves in the single well reservoir body will be divided into vertical multi-layer composite structure of reservoir permeability and single layer reservoir body two types, considering the four period of upper and lower two sets of lights in the study area the distribution features of the karst cave system, to light on the four as a system of reservoir permeability, light looking for A reserve-seepage system classifies and evaluates the interior of the reserve-seepage body according to the karst architecture and porosity of the reservoir in the reserve-seepage body, and defines the distribution law of the reserve-seepage body in the study area. The quantitative evaluation standard of reservoir and seepage body in the study area is determined, and the reservoir is carried out from two aspects of qualitative and quantitative.