川中-川南过渡带雷口坡组雷-^1亚段砂屑滩储层特征及成因机制

Arenaceous Debris Beach Reservoir Characteristics and Genetic Mechanism of Leill Sub- Member, Leikouvo Formation in Central Sichuan - South Sichuan Transition Zone

以川中-川南过渡带雷口坡组雷-^1亚段砂屑滩储层为例，从储层的沉积岩石学特征着手，定量分析了储层储集空间类型、微观孔喉结构、物性分布及孔渗关系等储层的基本特征，得出了雷-^1期砂屑滩储层的成因机制，建立了滩体迁移模式。结果表明，该套储层的成因机制主要为残余粒间孔保存及同生期大气淡水优化改造两种类型．储层的形成和分布受区内微地貌的次一级分异和海侵-海退旋回的共同控制，在局部微地貌高地有利于残余粒间孔的保存，并且由于海退持续时间长，沉积物充分暴露，大气淡水对储层的淋溶改造进行得较为彻底，储层厚度较大，质量较好、从而为后期储层预测模型的建立以及提高勘探成功率提供必要的地质依据．．

Central-South Sichuan transition zone Leil 1 Sub-Member, Leikoupo Formation reservoir, for example, fl＇om the reservoir characteristics of the sedimentary rocks to start with quantitative analysis of reservoir storage space of the type of micro-pore structure, distribution and physical properties of reservoir porosity and permeability relationship between the basic characteristics of mine arrived at a beach a sand reservoir chip formation mechanism, set up beach body migration patterns. The results show that the set of the genetic mechanism of the main reservoir for the preservation of residual intergranular pores and with the Health and optimization of phase transformation of two types of atmospheric water reservoir formation and distribution of micro-topography of the regional differentiation of the secondary one, and transgression - the sea regressive cycles of the common control of high ground in the local micro-topography is conducive to the preservation of residual intergranular pores, and because regression lasted longer, sediment has fully exposed the atmospheric leaching of fl＇esh water reservoir conducted a more thorough transformation, reservoir thickness larger, better quality, so as the latter part of reservoir prediction model and to improve the success rate of exploration to provide the necessary geological hasis.