A Coupling Model of Fishbone Multilateral Horizontal Well in Bottom Water Reservoir

doi:10.11885/j.issn.1674-5086.2013.05.07.01

Abstract

Abstract:

In order to solve the problems of productivity prediction and pressure distribution of herringbone branched horizontal
wellbore in bottom water reservoir，a coupling model of multilateral horizontal well and seepage flow in the reservoir is investigated.
Based on characteristics of the constant pressure supply boundary condition and micro-unit method，by subdividing
the reservoir rather than subdividing the well bore，a new coupling model of herringbone branched horizontal well in bottom
water reservoir is established. Subdivision of the reservoir is a new resolution type of micro-unit treatment and research method.
The obtained simplified model greatly decreases the calculation work and compute cost when productivity and pressure drop
profile are calculated. The results of the simplified model accord with the basic principles of accurate model. Meanwhile this
paper proposes the modified ratio of simplified model transferring to the accurate model. It′s an effective and convenient way
to apply the simplified model modified by this ratio to do the rapid evaluation of productivity. Moreover the simplified model
provides the research basis for productivity prediction of herringbone branched horizontal well in bottom water reservoir. And
it contributes to the further calculation of parameters like critical production and critical pressure drop to delay the occurrence
of bottom water breakthrough.

Key words: herringbone branched, horizontal well, bottom water reservoir, productivity formula, coupled model

Yue Ping*, Du Zhimin, Chen Xiaofan, Mo Fei, Li Wei. A Coupling Model of Fishbone Multilateral Horizontal Well in Bottom Water Reservoir[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2013.05.07.01.

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