深层超稠油多元热流体开采机理

Development mechanism of multivariate thermal fluid of deep super?鄄heavy oil

刘勇 王崇先 李晓辉 徐浩

中国石油吐哈油田分公司工程技术研究院，新疆 鄯善 838202

Engineering and Technology Research Institute, Tuha Oilfield Company, PetroChina, Shanshan 838202, China)

鲁克沁油田东Ⅱ区属于深层超稠油油藏，多元热流体开采技术在该类油藏中无应用先例，也缺乏室内物理模拟试验的理论性支持。文中针对深层超稠油油藏条件下的相态和流体特性，对多元热流体的开采机理进行研究，完成了超高温高压PVT实验、一维驱替实验及二维三维吞吐实验，认识了超稠油溶解多元热流体体系内单一气体组分和混合气体组分的黏度变化规律、多元热流体温度及稠油含水率对降黏效果的影响情况、多元热流体与其他驱油介质驱油的规律，以及多元热流体最优注入参数确定及水平井吞吐开采特征。该成果适用于深层、超深层超稠油应用多元热流体开采技术的有效开发。

The East Ⅱ area of Lukeqin Oilfield belongs to the deep super?鄄heavy oil reservoir. There is no precedent for the application of multivariate thermal fluid exploitation technology in this type of reservoir, and there is no theoretical support for indoor physical simulation tests. Based on the phase state and fluid characteristics of deep super?鄄heavy oil reservoir, this article studies the development mechanism of multivariate fluid, completes the experiment of ultra?鄄high temperature and pressure PVT experiment, one?鄄dimensional displacement experiment, two?鄄dimensional and three?鄄dimensional huff and puff experiments, and recognizes the variation of viscosity of single gas component and mixed gas component in super?鄄heavy oil dissolved multi?鄄component thermal fluid system, the influence of temperature of multivariate thermal fluids and water cut of heavy oil on viscosity reduction effect, the variation of displacement law of multivariate thermal fluids and other oil displacement media, the determination of optimal injection parameters of multivariate thermal fluids and the characteristics of huff and puff recovery in horizontal wells. The results of this mechanism are suitable for deep and ultra?鄄deep oil reservoirs to produce effectively with multivariate thermal fluid exploitation technology.

10.6056/dkyqt201905020