水平井探测半径计算方法

doi:10.12108/yxyqc.20240115

Lithologic Reservoirs ›› 2024, Vol. 36 ›› Issue (1): 157-168.doi: 10.12108/yxyqc.20240115

• PETROLEUM ENGINEERING AND OIL & GAS FIELD DEVELOPMENT • Previous Articles Next Articles

Calculation method of investigation radius of horizontal wells

ZHOU Hao, LIANG Lixia

Research Institute of Exploration and Development, Northwest Oilfield Company, Sinopec, Urumqi 830011, China

Received:2022-08-15 Revised:2022-10-29 Online:2024-01-01 Published:2024-01-02

Abstract

Abstract: The principle of mass conservation was used to convert a horizontal well into a virtual vertical well, each parameter and pressure were connected through the state equation, and then the calculation method of investigation radius of horizontal wells was studied. The results show that:(1) The newly derived formula for the investigation radius is a nonlinear implicit function with respect to time.(2) The investigation radii of oil wells increase with time, and the reservoir characteristic parameters have obvious influence on the typical curve of investigation radii and time.(3) The typical curve of investigation radii of horizontal wells in multizone composite reservoir obviously shows the multizone characteristics of composite reservoir.(4) There are N-1 inflection points on the typical curve of composite reservoir in N zone, which represents the response of pressure wave to the interface of two adjacent zones. The increase of inner zone radius will make the corresponding inflection points move to the upper right corner.

Key words: investigation radius, horizontal well, homogeneous reservoir, composite reservoir, well test, seepage mechanics, nonlinear implicit function

CLC Number:

TE355.6

ZHOU Hao, LIANG Lixia. Calculation method of investigation radius of horizontal wells[J].Lithologic Reservoirs, 2024, 36(1): 157-168.

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Calculation method of investigation radius of horizontal wells

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