Abstract

This paper discusses a data-base of information collected from 322 projects, all treated with the same Microbial Enhanced Oil Recovery Process An analysis of the data quantifies the effectiveness and economics of this particular process, and is a source of information useful for predicting treatment response in any given reservoir.

Introduction

During the past ten years, much attention has been focused on the evaluation of individual field applications of a variety of different Microbial Enhanced oil Recovery ("MEOR") processes. Little, if any, data has been published that reports the results of a single MEOR technology applied across a variety of reservoirs and production strategies. Consequently, oil producers have been resistant to accepting individual, commercial MEOR technologies because they perceive that MEOR has not been subjected to enough extensive, widespread field testing.

This paper will present data illustrating the effectiveness of a single MEOR process that has been successfully applied and results quantified in a large number of commercial projects, representing more than 2,000 producing oil wells in the United States. Since these projects represent such a large number of oil reservoirs, comprising a wide variety of bottomhole conditions, formations, and drive types, it is now possible to provide much needed data to producers that can be used to predict how any given reservoir will respond to this MEOR process.

A data-base, which is believed to be the first of its kind, has been created with data collected from the broad use of this MEOR system. The data has been organized to isolate ranges of individual reservoir characteristics like lithology, porosity, permeability, crude oil gravity, etc. so that they can be compared to the corresponding response in oil production observed after implementing MEOR. Information generated with the data-base can be used by producers as a tool to determine which of their reservoirs may be the best candidates for this process. It also provides oil producers with information they can use to make informed, economic decisions when considering the feasibility of utilizing this MEOR process once a candidate reservoir has been identified.

Background

Almost 3 million oil wells have been drilled nationwide within the United States and thus for more than 500 billion barrels ("bbls.") of oil have been discovered. primary and secondary recovery, using conventional technology, are expected to recover only 33% (~175 billion bbls.) of the 500 billion barrels of original oil in place ("OOIP").

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