水平井热采开发边底水稠油技术研究

Techniques for Horizontal Well Thermal Recovery of Heavy Oil Reservoir with Edge and Boundary Waters

稠油油藏受边底水的束缚和制约,开发过程中暴露出直井常规开采出砂严重、含水上升快、储量动用程度低、油藏采收率低等突出问题。针对边底水稠油油藏存在问题,开展边底水稠油油藏水平井热采开发技术研究,进一步改善油藏开发效果。通过深化油藏地质研究,剖析制约油藏开发的主要因素,应用先进的油藏数值模拟手段,研究并优化设计了热采水平井的技术界限,形成了热采水平井工艺配套技术。该技术应用于现场,大幅提高了边底水稠油油藏的储量动用率及采收率。

Heavy oil reservoir is restrained and bounded by edge and boundary waters, and in the recovery process some problems are encountered, such as serious sanding in the conventional recovery process of vertical well, high water cut increasing rate, low reservoir tapping efficiency and low oil recovery factor. Aiming to solve these problems, research was done on techniques for horizontal well thermal recovery of heavy oil reservoir with edge and boundary waters： firstly, a thorough study on oil reservoir geology was carried out; secondly, the main factors which restrain oil reservoir recovery were analyzed; thirdly, the technical boundaries of horizontal well thermal recovery were studied and optimized by the application of advanced oil reservoir numerical simulation methods; fourthly, supporting techniques of horizontal well thermal recovery were studied and formed. As a result, the reservoir tapping efficiency and oil recovery factor of heavy oil reservoir with edge and boundary waters were increased greatly when this technique was applied in oil fields.