一次值得借鉴的压裂施工

华北油田所辖的廊东油田是典型的高压低渗砂岩油藏，具有岩性致密、泥质含量大、强水敏性等地质特征。投产初期，单井产量较高，但生产一、二年后，压力下降快，产量递减也快，以致长期处于低效开发状态。“七五”期间曾进行压裂增产，但效果并不理想。１９９４年１２月，华北局与加拿大法玛斯特公司合作，对安６９－４５井进行水力压裂，取得了理想的增产效果。该文简要介绍该区块的地质特征和低效开发状况，具体介绍安６９－４５井压裂施工技术和保证施工质量、提高压裂效果的做法。

A fracturing operation with reference value

Langdong oil field,administrated by Huabei petroleum administration bureau,is a typical sandstone reservoir of high pressure and low permeability,it has dense lithology, large content of mudstone and strong water sensitivity. At the beginning of its production, the oil production rate per well was high. After one or two years of production, the pressure decreased rapidly,so did the production rate,therefore,being developed in a low efficiency for a long time.During the "Seventh-five plan period",fracturing operation was conducted with no ideal effect.In December 1994,a hydraulic fracturing operation was implemented in well An69-45 by Huabei petroleum administration bureau and a Canadian company, and perfect results were obtained. This paper briefly presents the geologic features and the low efficiency development status.The particular fracturing techniques used in well An 69-45 and the measures for controlling the quality and improving fracturing effectiveness are described in detail .