Title: Integrated field development plan optimisation of waterflood multiple complex carbonate reservoirs

Authors: Mohammad Yunus Khan; Ajay Mandal

Addresses: ZADCO, Abu Dhabi, United Arab Emirates ' Department of Petroleum Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad 826-004, India

Abstract: This paper describes a step by step work flow to optimise field development plan of three vertically adjacent complex carbonate reservoirs by using multiple strings in a given well to access them. It also provides an innovative view on how to develop multiple vertically separated, adjacent complex reservoirs from artificial (man-made) island with maximum reservoir contact (MRC) wells to get economically viable production. The focus was to revise the development plan of the major reservoir and use the future development wells of this reservoir to access other vertically adjacent minor reservoirs that are within the drilling reach from different artificial islands. The study addresses optimised well spacing, completion layers of well placement, well drill sequence, well type; and number of economic infill well placement and sectorisation strategies for optimal production. This study also includes assessment of the value of infill wells, dual-lateral, dedicated lateral and single-lateral wells to target more than one reservoir. An optimised integrated field development plan of major and minor reservoirs is formulated with new long horizontal MRC wells which include both single and dual-lateral wells accessing one, two or three reservoirs depending upon location and accessibility. [Received: September 1, 2017; Accepted: July 30, 2018]

Keywords: field development plan; FDP; water flood; dual completion wells; optimisation; numerical simulation; artificial island.

DOI: 10.1504/IJOGCT.2020.107032

International Journal of Oil, Gas and Coal Technology, 2020 Vol.24 No.2, pp.205 - 240

Received: 01 Sep 2017
Accepted: 30 Jul 2018
Published online: 01 May 2020 *

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