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Intisar“D”油藏是起源于古新世的碳酸盐岩礁,没有严重的流动遮挡。这一欠饱和油藏的原油相对密度为0.8251,溶解气油比为106m3/m3。油藏产层有效厚度为138m,海平面以下基准面深度为2743m,原始石油地质储量为2.8×108m3,原始油藏压力为29.33MPa。为了优化和提高产能和储量,采用了一系列成功的油藏管理策略。迄今为止,主要通过实施EOR项目已经采出原始石油地质储量的69.2%(19.1×104m3)。从1969年开始产油一直到1981年,通过底部注水和注大量烃气保持Intisar“D”油藏压力,合理利用气体和提高采收率,然后停止注水,但是继续成功注气直到现在。与常规不同,该油藏注气(非混相)采油比水驱更有效。为了进行分析,把油藏分成两个部分:水波及层带和气波及层带,以便分别评价两种驱替的波及效率。虽然在油藏顶部注气主要是以非混相方式进行的,但是该工艺一直是非常成功的驱替方式。到2005年12月,累积采油量为1.9×108m3,其中1.3×108m3原油是通过注气(二次和三次采油方法)采出的,而628×104m3原油是通过水驱采出的。
The Intisar “D ” reservoir is a carbonate reef that originated in the Paleocene without significant flow blockade. The under-saturated reservoir has a crude oil relative density of 0.8251 and a dissolved gas-oil ratio of 106 m3 / m3. The effective thickness of the reservoir is 138m, the depth of the reference plane below the sea level is 2743m, the original petroleum geological reserve is 2.8 × 108m3, and the original reservoir pressure is 29.33MPa. In order to optimize and improve capacity and reserves, a series of successful reservoir management strategies have been adopted. To date, 69.2% (19.1 × 104 m3) of primary oil geological reserves have been recovered mainly through the implementation of EOR projects. From the beginning of oil production in 1969 until 1981, the Intisar “D ” reservoir pressure was maintained at the bottom by injecting water and a large amount of hydrocarbon gas, rationalizing gas utilization and increasing oil recovery, and then stopping water injection but continuing to inject gas successfully until now . Unlike conventional practice, gas-injection (non-miscible) production in this reservoir is more efficient than waterflooding. For the purposes of this analysis, the reservoir is divided into two sections: water and belt and gas and belt so that the sweep efficiency of both floats can be evaluated separately. Although gas injection at the top of the reservoir is primarily carried out in a non-miscible manner, the process has been a very successful alternative to flooding. As of December 2005, the accumulated oil production was 1.9 × 108 m3, of which 1.3 × 108 m3 of crude oil was produced by gas injection (secondary and tertiary recovery methods) and 628 × 104 m3 of crude oil was recovered by water flooding.