特低渗油藏压裂井注采井距与注水见效关系

Relationship of injector-producer spacing and waterflooding response for fracturing wells in ultra-low permeability reservoir

刘伟伟 2 苏月琦² 王茂文² 辛丽珺³ 徐小钫⁴

成都理工大学沉积地质研究院，四川 成都 610059 中国石化中原油田分公司天然气产销厂，河南 濮阳 457061 中国石油吐哈油田公司勘探开发研究院，新疆 哈密 839009 中国石油吐哈油田公司信息产业处，新疆 哈密 839009

Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, 610059, China Natural Gas Production and Marketing Plant, Zhongyuan Oilfield Company, SINOPEC, Puyang 457061, China Research Institute of Exploration and Development, Tuha Oilfield Company, PetroChina, Hami 839009, China Information and Industry Departmnet, Tuha Oilfield Company, PetroChina, Hami 839009, China

针对目前注采井距与注水见效关系研究中缺乏对应压裂井研究的现状，以压裂井压力波椭圆等压面传播理论为基础，推导了特低渗油藏压裂井注水见效时间与椭圆动边界半径、启动压力梯度、油井产能水平和原油黏度等的综合关系，并对上述因素对注水见效时间的影响进行了研究。结果表明，这些因素对注水见效均有较大影响，压裂井对上述因素影响的敏感性远小于未压裂井，特别在目标油藏原油黏度较大时，此种差异表现得更为明显，合理注采井距的选择是多因素下主次要矛盾共同作用的结果，其选择应放在优化、高效开发油藏的大系统中考虑。

Aiming at the situation that the fracturing wells are lack in the study of injector-producer spacing and waterflooding response and based on the theory of pressure wave ellipse face spread, the relationship of waterflooding response time and elliptic move boundary, start-up pressure gradient, oil well productivity and oil viscosity is deduced. Furthermore, the influence factors of waterflooding response time are researched. Results show that the above factors have great influences on waterflooding response time. Sensitivity for fracturing wells is far less than that for no-fracturing wells. Especially when the oil viscosity of target reservoir is high, the difference is more obvious. Choice of reasonable injector-producer spacing is common action result of prime and secondary contradiction, so the choice should be optimized in the large system development.

10.6056/dkyqt201206013