Adaptability quantitative evaluation method for complex fault block reservoir strong-side simulated water driving technology

Abstract

The invention provides an adaptability quantitative evaluation method for a complex fault block reservoir strong-side simulated water driving technology. The adaptability quantitative evaluation method for the complex fault block reservoir strong-side simulated water driving technology comprises the following steps of 1, carrying out sensitivity research on fault block reservoir strong-side simulated water driving reservoir influencing factors so as to obtain a contribution value of a single factor to the increasing of a recovery ratio; 2, establishing a subordinating degree function of each single factor to the recovery ratio increasing effect of strong-side simulated water driving, bringing each reservoir factor of the fault block into the subordinating degree functions and figuring out the subordinating degrees of the single factors; 3, figuring out an adaptation degree evaluation result of each single factor; and 4, figuring out an adaptability quantitative evaluation result of the fault block strong-side simulated water driving. The adaptability quantitative evaluation method for the complex fault block reservoir strong-side simulated water driving technology provides a set of quantitative calculating method for judging the adaptation degree of the complex fault block reservoir strong-side simulated water driving; and the adaptation degree judgment of a specific block is improved from the traditional adaptation or inadaptation qualitative conclusion to the specific quantitative value.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a method for quantitatively evaluating the adaptability of imitation strong edge water flooding technology in complex fault block oil reservoirs. Background technique [0002] The imitation strong edge water flooding technology is a technology first proposed by Shengli Oilfield in recent years to improve the recovery of complex fault-block reservoirs in the ultra-high water cut period. It has achieved good development results in Shengli Oilfield. This technology is currently The existing block selection criteria were established by the Shengli Oilfield Geological Science Research Institute according to the traditional single index method. The standards are as follows: the fault block is relatively closed; the oil-water viscosity is relatively small (<50), and the water body multiple is small (<100); Larger horizontal permeability is advantageous (200×10 -3 μm...

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Problems solved by technology

There are certain defects in the use of this standard, for example, when screening different types of complex fault blocks in the Xianhe Oilfield, as shown in Table 1 and figure 2 As shown, it is found that only reverse roof weak edge water fault blocks, closed weak edge water fault blocks and extremely complex closed fault blocks are applicable, but it is impossible to judge which of these three types of fault blocks is more applicable

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