江东区块焦页A平台压裂试气效果实践认识

On Practice of Fracturing-aided Gas Testing Effect of Jiaoye Platform A in Jiangdong Block

江东区块焦页A平台各井存在"整体均高产,井间有差异"的特点。从压裂施工工艺和地质构造两个方面对此展开分析,发现布井方式、穿行层位、水平井光滑程度等因素是影响产量差异的主要原因,地层静压系数高、张性应力、中强曲率发育是该平台高产的地质有利因素,由此形成了"前置胶液阶梯提排量促延伸,变排量、变粒径、变粘度促复杂"的压裂工艺体系,并首次开展焖井试验,达到改善渗流参数、提高气井产量的目的。

Each well is characterized by high yield on the whole and diversity in well spacing in Jiaoye Platform A in Jiangdong Block.The analysis of fracturing technology and geological structure confirms that the main factors for yield gap contain well pattern,traject position and smooth level of horizontal wells and that high stratum static pressure coefficients,tensile stress and moderately strong curvature development are beneficial geological factors for high yield of Platform A.Thus has formed the ripe fracturing technology system.The first shut-in-well test is launched to improve fluid flow parameters and increase gas-well production.