石油钻采工艺2017，Vol.39Issue(2)：237-243,7.DOI:10.13639/j.odpt.2017.02.020
致密碳酸盐岩储层复合缝网酸压技术研究及矿场实践 ——以大牛地气田下古生界马五5碳酸盐岩储层为例
Study on composite fracture-network acid fracturing technology for tight carbonate reservoirs and its field application: a case study on Mawu5 carbonate reservoir of Lower Paleozoic in Daniudi Gasfield
摘要
Abstract
In Daniudi gasfield, the Mawu5 carbonate reservoir of Lower Paleozoic is a low-porosity and low-permeability tight reservoir with low reservoir abundance and developed natural fractures. When conventional acid fracturing is applied in this reservoir, the stimulated volume is limited. The production after the commissioning of horizontal well declines fast and production stabilization is of high difficulty. To solve these problems, rock brittleness index characteristics of Mawu5 carbonate reservoir of Lower Paleozoic in Daniudi gasfield were analyzed. Composite fracture-network acid fracturing technology was studied. The design concept of "create fracture by using large-displacement prepad fluid + perform large-scale acid fracturing of fracture network by using gelled acid + keep fracture conductivity by using post proppant" was adopted. Hydraulic sand fracturing was combined with gelled acid fracturing. Linear-gel prepad fluid system, gelled acid system and composite proppant system were selected for composite fracture-network acid fracturing. And the construction parameters of composite fracture-network acid fracturing were optimized, including discharge capacity, operationalliquid dosage and proppant volume. This technology was actually applied to Mawu5 tight carbonate reservoir of Lower Paleozoic in Da-niudi gasfield. And it is better applicable to this reservoir and its stimulation effect is remarkable. This technology is of great significance to the large-scale productivity construction of Lower Paleozoic gas reservoirs in Daniudi gasfield.关键词
大牛地气田/碳酸盐岩储层/缝网/酸压/胶凝酸体系/施工参数优化Key words
Daniudi gasfield/carbonate reservoir/fracture network/acid fracturing/gelled acid system/construction parameter optimization分类
能源科技引用本文复制引用
储铭汇..致密碳酸盐岩储层复合缝网酸压技术研究及矿场实践 ——以大牛地气田下古生界马五5碳酸盐岩储层为例[J].石油钻采工艺,2017,39(2):237-243,7.基金项目
国家科技重大专项"低丰度致密低渗油气藏开发关键技术"(编号:2016ZX05048) （编号:2016ZX05048）
中国石油化工股份有限公司科技开发部项目"大牛地气田下古生界水平井深度酸压关键技术"(编号:P15168-1). （编号:P15168-1）
