SAGD开发中突破夹层技术对策研究

发布时间：2018-11-18 11:46

【摘要】：开发实践表明,稠油油藏内部发育的夹层影响蒸汽辅助重力泄油(SAGD)开发效果。实际SAGD开发应当充分考虑夹层对SAGD生产效果的影响,寻找突破夹层的有效对策,以期提高SAGD产量。以国内某超稠油油藏地质特征为基础,结合夹层岩石力学参数测试结果,利用耦合岩石力学数值模拟技术确定了不同参数(岩石力学参数、物性参数、操作参数)对岩石变形量、SAGD产量的敏感性。研究结果表明,夹层的渗透率和SAGD注汽压力是影响SAGD产量的主要因素。进一步地,针对夹层特征,结合实际操作可行性,提出了提高注汽压力和直井辅助两种突破夹层技术对策,并给出了相应的技术界限及突破效果,该研究结果可用于指导稠油油藏双水平井SAGD经济高效开发。
[Abstract]:The development practice shows that the intercalation developed inside the heavy oil reservoir affects the (SAGD) development effect of steam assisted gravity drainage. The actual development of SAGD should fully consider the influence of interlayer on the production effect of SAGD and find effective countermeasures to break through the mezzanine in order to increase the output of SAGD. Based on the geological characteristics of a super heavy oil reservoir in China and the test results of mechanical parameters of intercalated rock, different parameters (rock mechanics parameter, physical property parameter) are determined by coupled rock mechanics numerical simulation technique. Operating parameters) sensitivity to rock deformation and SAGD yield. The results show that the permeability of intercalation and the steam injection pressure of SAGD are the main factors affecting the production of SAGD. Furthermore, according to the characteristics of intercalation, combined with the practical operation feasibility, the paper puts forward two kinds of technical countermeasures to break through the interlayer, such as increasing steam injection pressure and auxiliary vertical well, and gives the corresponding technical limit and breakthrough effect. The results can be used to guide the development of SAGD in dual horizontal wells in heavy oil reservoirs.
【作者单位】：中国石油勘探开发研究院;提高采收率国家重点实验室;中国地质大学(北京)能源学院;
【基金】：国家科技重大专项“改善SAGD开发效果技术研究与应用”(2016ZX05012-002);国家科技重大专项“稠油、碳酸盐岩和致密油藏开发主体技术与应用潜力”(2016ZX05016-006)
【分类号】：TE357.4

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