鲁克沁油田鲁2块水驱后天然气气水交替驱油模拟研究

Simulation Study on Drainage of Oil by Alternative Water and Natural Gas after Water Flooding in Block Lu 2

吐哈鲁克沁油田鲁2块深层断块型边底水稠油油藏现处于高含水开发阶段,其埋藏深度为2 300 m,油水黏度比大,油藏压力高,导致注蒸汽开采时注入过程热损失大,油藏难以采出。对水驱后注气提高油藏采收率这一开采方式进行了大量调研基础上,针对鲁2块水驱后的油藏特征进行了天然气气水交替驱油模拟研究。该研究建立了鲁2块典型地质模型,进行了天然气气水交替驱主要影响因素的模拟优化,并预测了该油藏的增产效果,为该油藏的进一步开采提供了可参考的理论性依据。

The deep heavy oil reservoirs with edge and bottom water of Block Lu 2 of Lukeqin Oilfield of Tuha are under development stage with high water cut.The depth of 2 300 m,highly viscous oil and high reservoir pressure result in large heat loss in thermal recovery and difficult recovery of the reservoirs.A simulation study on the alternation drainage by water and natural gas is carried out based on deep investigation of enhanced oil recovery by gas injection after water flooding and the reservoir characteristics after water flooding.The study establishes typical geology model;conducts simulation optimization of main effect factors of alternative drainage by water and natural gas;predicts production gain of the reservoirs;and provides theoretical bases for further development of the reservoirs.