地层损害

蜡沉积造成的地层损害导致页岩产量下降

本文的作者讨论了一种生物表面活性剂处理方法,该处理方法为修复多孔介质中高分子量石蜡沉积引起的地层损害提供了一种经济的方法。

油/水系统界面处的蜡晶体
图1-含有和不含F15生物表面活性剂配方的油/水系统界面处的晶体。

产量递减曲线分析显示,德克萨斯州西部的三口候选井的消耗速度快于类型递减曲线所示的速度,这表明潜在的异常渗透率降低机制。建议采用基于生物表面活性剂的挤压方案,并将其应用于三个水平井。生物表面活性剂处理为修复多孔介质中高分子量石蜡沉积引起的地层损害提供了一种替代且经济的方法,且不需要应用昂贵的干预技术。

介绍

特拉华盆地的 Bone Springs 水平石油勘探范围从新墨西哥州东南部延伸到德克萨斯州西部。堆叠式多产油藏具有不同的岩石特性,具有优势,但也很复杂。

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Formation damage

Formation Damage Caused by Wax Deposition Results in Shale Production Decline

The authors of this paper discuss a biosurfactant treatment that offers an economical method for remediation of formation damage caused by high-molecular-weight paraffin wax deposition in porous media.

Wax crystals at the interface of the oil/water system
Fig. 1—Wax crystals at the interface of the oil/water system with and without the F15 biosurfactant formulation.

Analysis of production decline curves revealed that three candidate wells in West Texas depleted faster than indicated by a type decline curve, indicating a potentially abnormal permeability-reduction mechanism. A biosurfactant-based squeeze program was recommended and applied in three horizontal wells. The biosurfactant treatment offers an alternative and economical method for remediation of formation damage caused by high‑molecular-weight paraffin wax deposition in porous media that does not require costly intervention techniques to apply.

Introduction

The Bone Springs horizontal oil play in the Delaware Basin spans from southeast New Mexico into West Texas. Stacked, multipay reservoirs, each with diverse rock properties, possess upside but also complexity.

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