油藏模拟

研究探索油田开发的裂缝驱动相互作用缓解策略

本文介绍了使用耦合水力压裂扩展、储层流动和地质力学工具对裂缝驱动相互作用进行的数值建模研究。

图 1 — 生产 10 年后着陆深度处的基质衰竭视图。所有子井均在母井衰竭程度达到 0.86 时完井。颜色代表衰竭程度。L、M 和 S 分别代表大、中、小井距。
图 1 — 生产 10 年后着陆深度处的基质衰竭视图。所有子井均在母井衰竭程度达到 0.86 时完井。颜色代表衰竭程度。L、M 和 S 分别代表大、中、小井距。
来源：URTeC 4055561。

已经使用耦合的水力压裂扩展、储层流动和地质力学工具对裂缝驱动相互作用 (FDI) 进行了数值建模。数值研究表明，对于所研究的盆地，FDI 和一些缓解策略对长期母井产量的影响微乎其微。然而，母井枯竭（体积和面积范围）、井间距和子裂缝不对称会极大地影响 FDI 导致的子井产量。

介绍

鉴于美国非常规油藏中 60% 以上的新井都是加密钻井，井间 FDI（也称为压裂命中）最近引起了人们的关注。

虽然天然裂缝和基质渗透性等不可控参数确实会影响 FDI 对油井产量的影响，但作者主要关注的是可控因素。现场观察表明，井距越紧、完井规模越小，对母井和子井产量的负面影响就越小。

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原文链接/JPT
Reservoir simulation

Study Explores Fracture-Driven Interaction Mitigation Strategies for Field Development

This paper describes numerical modeling studies of fracture-driven interactions using a coupled hydraulic-fracturing-propagation, reservoir-flow, and geomechanics tool.

Fig. 1—Map view of the matrix depletion at the landing depth after 10 years of production. All child wells are completed when the parent wells feature a depletion level of 0.86. The color represents the level of depletion. L, M, and S represent large, medium, and small well spacing, respectively.
Fig. 1—Map view of the matrix depletion at the landing depth after 10 years of production. All child wells are completed when the parent wells feature a depletion level of 0.86. The color represents the level of depletion. L, M, and S represent large, medium, and small well spacing, respectively.
Source: URTeC 4055561.

Numerical modeling of fracture-driven interactions (FDI) using a coupled hydraulic-fracturing-propagation, reservoir-flow, and geomechanics tool has been conducted. The numerical study showed that, for the basins studied, FDI and some mitigation strategies have minimal effect on long‑term parent-well productions. Parent depletion (volume and areal extent), well spacing, and child-fracture asymmetry, however, greatly affect child-well production as the result of FDI.

Introduction

Interwell FDI, also known as frac hits, has garnered recent attention given that more than 60% of new wells drilled in US unconventional reservoirs are infill drilling.

Whereas uncontrollable parameters, such as natural fractures and matrix permeability, do contribute to the effect of FDI on well production, the authors’ primary focus lies on controllable factors. Field observations have shown that tighter well spacing and smaller completion sizes tend to result in fewer negative effects on both parent- and child-well production.

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