CO2 flooding minimum miscrible pressure prediction method
A miscible pressure and prediction method technology, which is applied in earthwork drilling, special data processing applications, mining fluids, etc., can solve the problems of cumbersome calculation, high cost, and low prediction accuracy
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[0024] The Qiaokou Oilfield in the Dongpu Sag was the first to use CO in the Zhongyuan Oilfield. 2 It is one of the low-permeability reservoirs with enhanced oil recovery. Combined with Qiaokou Oilfield CO 2 The prediction examples and accompanying drawings of flooding minimum miscibility pressure, the present invention is described in detail, by figure 1 As can be seen, the concrete steps of the present invention are as follows:
[0025] 1. Determination of basic characteristic parameters of formation crude oil: including dead oil volume V d , Excluded formation crude oil volume V of , dead oil quality W d , the volume V of flash off gas under standard conditions g , Density ρ of flash offgas under standard conditions g .
[0026] 1.1 Use the downhole sampler to extract formation crude oil samples in the wellbore separator of the oil production well;
[0027] 1.2 Use the extracted formation crude oil samples to determine the basic characteristic parameters of formatio...
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