钻井/完井液

墨西哥湾高压/高温井电缆测井作业使用水基钻井液

本文描述了在墨西哥湾深水井中在高压/高温小井眼环境中使用水基油藏钻井液进行的裸眼电缆测井作业。

图1-井剖面。 TVD = 真实垂直深度。
图1-井剖面。TVD = 真实垂直深度。

裸眼电缆测井由于其超拉能力相对于随钻测井较低,因此被卡工具的风险会增加。在枯竭水库典型的较高超平衡环境中,风险会增加,但卡住风险的其他方面是可以管理的。完整的论文描述了在墨西哥湾深水井 (GOM) 的裸眼电缆测井作业中,在高压/高温 (HP/HT) 小井眼环境中,在近 7,000 psi 的超平衡压力下,采用水基测井技术所采取的措施。油藏钻井液 (RDF) 可实现高效测井作业,而不会因输送相关问题而造成时间损失。

介绍

有线数据采集项目计划用于深水 GOM 开发领域的注入井。该井的目标是通过注水维持储层压力,最大限度地提高采收率,并评估断块的下倾部分。

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原文链接/jpt
Drilling/completion fluids

Wireline Logging Operation Uses Water‑Based Drilling Fluid in HP/HT Gulf of Mexico Well

This paper describes an openhole wireline-logging operation in a deepwater Gulf of Mexico well in a high-pressure/high-temperature slimhole environment using water-based reservoir drilling fluid.

Fig. 1—Well profile. TVD = true vertical depth.
Fig. 1—Well profile. TVD = true vertical depth.

Openhole wireline logging, because of its lower overpull capacity relative to logging while drilling, is subject to increased stuck-tool risk. The risk increases in higher-overbalance environments typical for depleted reservoirs, but other aspects of sticking risk can be managed. The complete paper describes the measures taken in an openhole wireline-logging operation in a deepwater Gulf of Mexico (GOM) well under nearly 7,000-psi overbalance in a high-pressure/high-temperature (HP/HT) slimhole environment using water-based reservoir drilling fluid (RDF) to achieve an efficient logging operation without incurring lost time attributed to conveyance-related issues.

Introduction

The wireline data-acquisition program was planned for an injector well in the deepwater GOM development field. The goal of the well was to maintain reservoir pressure through waterflooding, maximize recovery, and appraise the downdip portion of the fault block.

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