深层稠油难动用储量压裂增产技术研究与试验

吐哈油田的玉1块属超稠油油藏，油层物性差．埋深为3328～3365m，不能投入正常生产。根据玉1块稠油油藏特点．应用小型压裂测试技术、高砂比宽短缝压裂技术、小排量低前置液的暂堵剂控制裂缝垂向延伸技术、防止水基压裂液进入地层造成稠油乳化及水敏伤害、压裂后气举快速排液等配套压裂工艺．开展了稠油油藏压裂增产探索性试验。对玉1块进行现场试验．施工排量2．6m^3／min．前置液34．8m^3，携砂液56m^3，加砂18．74m^3，平均砂比41．2%，最高砂比60％。稳定日产油量由压裂前的4t提高到压裂后的11t．不含水．证实没有压窜下部含油水层，压裂效果明显。图2表1参8

Fracturing technology research and test for deep heavy oil reservoirs

Block Yu 1, Tuha Oilfield, is a super heavy oil reservoir with poor reservoir properties and buried depth of 3328-3365m. Normal production cannot be maintained because of its low porosity and permeability. Based on the reservoir properties, tests of fracturing technology for heavy oil reservoirs were carried out by applying minitype fracturing and testing technology, high sand concentration and wide-short fracture fracturing technology, the technology of vertical fracture extension control using the temporary blocking agent with low-displacement pad fluid, and the technology preventing layers from water base fracturing fluid, etc. The displacement is 2. 6 m3/min, pad fluid is 34. 8 m3 , sandcarrier is 56 m3 , sand volume is 18. 74 m3, the average sand ratio is 41. 2%, and the maximum sand ratio is 60%. The daily production increased from 4t to 11t with no water production. The success of fracturing in Well Yu 1 improved the development effect and provided an economical and effective means for the future development of heavy oil reservoir in deep zone.