吴明录,赵高龙,姚军,王骏,郝洁
WU Minglu,ZHAO Gaolong,YAO Jun,WANG Jun,HAO Jie

• 1:中国石油大学(华东)石油工程学院

摘要(Abstract)：

针对稠油水平井热采过程中注入蒸汽向外扩散造成的地层岩石及流体性质差异,建立了稠油热采三区复合油藏水平井试井解释模型。通过Laplace变换和Fourier有限余弦积分变换进行降维和齐次化处理求得相应的垂直线源解,再沿水平井方向对此线源解进行压降叠加(积分)得到水平井的条带源解,然后通过取极限得到水平井在拉氏空间的等效线源解,最后经过Stefest数值反演可得到水平井在真实空间的井底压力解。对稠油热采水平井的压力响应特征和参数敏感性进行了分析,结果表明:在测试时间足够长的情况下,稠油热采水平井的压力导数曲线一般具有多个水平段、过渡段和"凸起"等特征,水平段是压力在不同渗流区域传播时的径向流反映,过渡段是压力传播到两区界面时区域流体或地层物性差异的反映,"凸起"是不同渗流区域间弹性储容能力差异的反映。
In the light of the differences in the stratigraphic rocks and liquid properties resulted from the spread out injected steam in the process of the horizontal-well heavy-oil thermal recovery,the well test interpreting model is established for the heavy-oil thermal recovery in three-block composite reservoirs. With the help of Laplace transformation and Fourier finite cosine integral transformation,the dimensionality reduction and homogeneous treatment are conducted to obtain the appropriate vertical-line source solution. And moreover this line source solution is integrated and superimposed horizontally to get the strip source solution of the horizontal wells,and then the equivalent line-source solution of the horizontal wells can be achieved by taking the limit. Finally,after Stefest numerical inversion,the bottom-hole pressure expression in the real space of horizontal well is derived. The analyses on the pressure response characteristics and parameter sensitivity are also performed for the wells. The results show thatunder the conditions of enough long test time,the pressure derivative curves of the thermally recovered horizontal wells are characterized by several horizontal sections,transitional sections,"bulge"and so on. The horizontal sections are the reflections of the radial flow when the pressures spread in different seepage areas; the transitional sections show the differences in the regional fluids and formation physical properties when the pressures propagating to the interfaces between the two blocks; and the "bulge"indicates the difference of the elastic reservoir capacity among the different seepage areas.

关键词(KeyWords)： 稠油热采;水平井;三区复合油藏;试井;压力动态
heavy oil thermal recovery;horizontal well;three-block composite oil reservoir;well test;pressure dynamic/performance

Abstract:

Keywords:

基金项目(Foundation): 长江学者和创新团队发展计划资助“复杂油藏开发和提高采收率的理论与技术”(IRT1294);; 国家高技术研究发展计划(863计划)“深水油气田智能完井关键技术”(2013AA09A215)

作者(Author): 吴明录,赵高龙,姚军,王骏,郝洁
WU Minglu,ZHAO Gaolong,YAO Jun,WANG Jun,HAO Jie

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