MLB地区须家河组二段储层特征及主控因素分析

Reservoir Characteristics and Main Influencing Factors of Xujiahe 2 Member, MLB Area

近几年来MLB地区须二段致密砂岩气藏获得了重大突破,极大地推动了该地区勘探开发一体化进程。针对致密砂岩发育的特点,综合分析野外露头、钻井岩心、镜下分析等资料,认为有利沉积微相是储层发育的基础,成岩作用是影响储层物性好坏的重要因素,而裂缝的发育程度是控制储层渗流能力的关键因素。

Recently,an exploration of Xujiahe 2 Member tight sandstone gas reservoir has gained a great breakthrough in MLB area,which pushes enormously the integration of both exploration and development.Based on the growth characteristics of tight sandstone,it is found after outcrop observation,drilling-data and microscopic analysis tha(t1)favorable sedimentary microfacies is the basis of reservoir growth;(2)diagenesis is the main factor affecting physical property of reservoir;and(3)development degree of fracture is the key factor to control seepage capacity of reservoir.In addition,reservoir characteristics of Xujiahe 2 Member and its main influencing factors are studied systematically,which also can provide available support for deepening a reservoir evaluation.