苏里格致密砂岩气田潜力储层特征及可动用性评价

doi:10.11743/ogg20170508

摘要/Abstract

摘要： 苏里格气田开发已全面进入稳产阶段，后备优质储量资源相对不足，对低于物性下限标准的储层进行潜力储层筛选并评价其开发可动用性，具有重要意义。面对气田致密砂岩储层分类不尽完善的问题，继承性开评展了储层系统性综合评价，将储层划分成5大类6种类型，并明确Ⅲ₂类储层是未来最具有开发潜力的储层类型。潜力储层形成主控于同砂岩粒度密切相关的储层物性，即发育于高能心滩-辫状河道微相中上部、中-低能心滩-辫状河道微相主体及中下部物性较差的中-细粒岩相部分。总结了潜力储层的6种发育模式，提出了间接动用、组合动用和直接动用等3种开发动用方式。可动用性评价表明，直接和间接动用方式开发效果相对较好，潜力储层具备较好的开发前景。潜力储层特征及可动用性评价可为未来此类储层开发提供有力支撑。

关键词: 可动用性评价, 潜力储层, 储层评价, 致密砂岩, 苏里格气田

Abstract: Sulige tight sandstone gas field has been in the stable production stage.However,the remaining undeveloped high-quality gas reserves is not sufficient for long term stable production.It is of great significance to utilize potential reservoirs which are below current quality cut-offs,and to evaluate their recoverability to increase gas resources for long term production.Considering that the present reservoir classification criteria is not sufficient,a new comprehensive evaluation criterion of tight sands reservoir is established.Tight sandstone reservoir in Sulige gas field can be divided into 5 categories (6 types),and the Ⅲ₂ type is the most potential reservoir for future development.The potential reservoir is mainly controlled by their physical properties,which in turn related to grain size.The reservoir is fine-middle grained sandstone which belongs to middle-upper part of high-energy channel bar-braided channel,and middle-lower part of low-energy channel bar-braided channel.6 types of formation pattern and 3 kinds of development modes (indirect,combined and direct) for the potential reservoir are also summarized.Recoverability evaluation reveal the relatively good results for direct and indirect method.This potential reservoir characterization and recoverability evaluation can provide a reliable basis for future potential reservoir development.

Key words: recoverability evaluation, potential reservoir, reservoir evaluation, tight sandstone, Sulige gas field

中图分类号:

TE122.2

王国亭,贾爱林,闫海军,等. 苏里格致密砂岩气田潜力储层特征及可动用性评价[J]. 石油与天然气地质, 2017, 38(5): 896-904. doi: 10.11743/ogg20170508 Wang Guoting,Jia Ailin,Yan Haijun,et al. Characteristics and recoverability evaluation on the potential reservoir in Sulige tight sandstone gas field[J]. Oil & Gas Geology, 2017, 38(5): 896-904. doi: 10.11743/ogg20170508

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