摘要：It is difficult to predict the oil and gas productivity when multiple production sections are applied to produce multiple reservoirs at the same time. To solve this problem, a semi-analytical productivity prediction model of double-step horizontal wells is established. Reservoir anisotropy, properties, seepage interference, wellbore pressure drop are considered in this model. The discretization method is applied to divide the double-step horizontal well into several sections for the coupling of reservoir model and wellbore model based on some relevant theories of seepage mechanics, fluid mechanics and numerical analysis. This paper takes stepped horizontal wells as the research object and proposes a set of analysis methods for the applicable conditions of stepped horizontal wells. This method puts forward the concept of non-dimensional production, which is the ratio of the oil production between the lower step section of the stepped well and the upper step section. The non-dimensional production reflects the contribution of the upper and lower step sections to the productivity of the stepped horizontal wells. For the dimensionless production, "three intervals" are defined, which are the "upper step section inefficient area", the "lower step section inefficient area", and the "effective area". The dimensionless production is used as evaluation criteria for the applicable conditions of stepped horizontal wells. In this paper, the applicable condition analysis method of stepped horizontal wells is applied in several oil wells to determine the reasonable permeability difference, viscosity difference, elevation difference, horizontal distance and the two step sections location. This paper proposed an applicable condition analysis method to determine the best characteristic parameters of two stepped horizontal wells. ? 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

ISSN号：1866-8755

卷、期、页：p2013-2020

发表日期：2022-01-01

期刊分区（SCI为中科院分区）：无

收录情况：EI（工程索引）

发表期刊名称：Springer Series in Geomechanics and Geoengineering

参与作者：张利军,谭先红

通讯作者：彭龙,舒晋

第一作者：韩国庆

论文类型：会议论文

论文概要：张利军,彭龙,韩国庆,谭先红,舒晋，Research on the Applicability Analysis of Double Step Horizontal Wells，Springer Series in Geomechanics and Geoengineering，2022，p2013-2020

论文题目：Research on the Applicability Analysis of Double Step Horizontal Wells