In-Well Dual Canned ESP Completion Test To Validate Safe Deployment in Deep Water

Topics: Artificial lift
Source: OTC 26002
Fig. 1: Example of the multiple control lines and electric cables located around the upper production tubing above the canned-ESP equipment and below the tubing hanger.

Deepwater and ultradeepwater completions use numerous hydraulic control lines for control and actuation of downhole equipment. Incorporating a completion system with an in-well lift such as electrical submersible pumps (ESPs) increases the number of electrical lines needed. This paper discusses the planning and execution of a stack-up test (SUT) to determine whether a completion system incorporating a dual canned ESP system with multiple control lines can be deployed efficiently and safely in a deepwater, high-pressure/high-temperature (HP/HT) environment.

Introduction

Lower Tertiary Play Characteristics and Challenges. Fields in the Lower Tertiary play, also known as the Paleogene, have low porosity (15–25%) and low permeability (<10 md), which reduce the amount of oil that can be recovered without assistance. In addition, Lower Tertiary water depths range from 5,000 ft to more than 10,000 ft; reservoirs are deeper than 26,000 ft; pressures range from 25,000 to 30,000 psi; and temperatures can be higher than 300°F, further complicating production. The Wilcox formation lies in the Lower Tertiary and is divided into the Upper, Middle, and Lower Wilcox on the basis of each section’s stratigraphy.

The Lower Tertiary formations can produce large volumes of oil and gas, assisted by high pressure within the formation. However, as the reservoir pressure depletes, adequate production rates cannot be maintained without effective reservoir-pressure maintenance or artificial lift. In shallow-water wells, gas lift assistance has been used and proved effective for production but requires a large gas supply and infrastructure to support production.

This article, written by Special Publications Editor Adam Wilson, contains highlights of paper OTC 26002, “Testing In-Well Dual Canned ESP Completion System To Validate Safe Deployment in Deep Water: A Collaborative Effort To Understand Surface and Downhole Requirements,” by Kim Tijerina, Baker Hughes, and Carlos Pardo and Andy Hope,Chevron, prepared for the 2015 Offshore Technology Conference, Houston, 4–7 May. The paper has not been peer reviewed. Copyright 2015 Offshore Technology Conference. Reproduced by permission.
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In-Well Dual Canned ESP Completion Test To Validate Safe Deployment in Deep Water

26 March 2016

Volume: 68 | Issue: 4

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