Well-testing Interpretation Model for Strip Reservoirs with Finite Diversion Faults

doi:10.11885/j.issn.16745086.2016.10.18.01

Abstract

Abstract:

At present, well fault seal analysis tests are mainly focused on closed faults. When using the existing well test interpretation model to explain oil and gas well-test data with non-closed faults, especially with a finite diversion fault boundary, the results are not ideal. By introducing the concept of interfacial skin, a new model of well-test interpretation with a finite diversion fault in stripe reservoirs was established. The model considers not only the fluid passing through the fault plane, but also the flow of fluid in the fault. The Fourier cosine transform, Laplace transform, and other mathematical physics methods were used to obtain the bottom hole pressure equation. The bottom hole stress response curves of the model were plotted, and there were seven flow stages. The results show that the larger the F_CD value, the more concave the curve. The larger the S value, the more convex the curve; when the S value is sufficiently large, characteristics of a closed fault are demonstrated. η_fD mainly affects the amount of decrease in the pressure derivative curve. The fluidity ratio, thickness ratio, and pressure derivative coefficient ratio mainly affect the increase and decrease in the pressure derivative curve.

Key words: finite diversion fault, interfacial skin, pressure dynamic, stripe reservoir, well test model

CLC Number:

TE353

ZENG Yang, ZHANG Liehui, KANG Xiaodong, XIE Xiaoqing. Well-testing Interpretation Model for Strip Reservoirs with Finite Diversion Faults[J]. 西南石油大学学报(自然科学版), 2017, 39(5): 155-162.

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