Integration of a Risk-Management Tool and an Analytical Simulator for Assisted Decision-Making in IOR

Abstract

TX 75083-3836 U.S.A., fax 01-972-952-9435. AbstractRisk management has become an integral part of the decisionmaking workflow in the oil and gas upstream business. As many oil fields reach a mature state, the need for rejuvenation and decline mitigation of assets set ground for Improved-Oil Recovery (IOR) opportunities. However, the associated decision-making process requires incorporating screening, reservoir simulation and financial evaluation, demanding complex multidisciplinary team efforts. It is important that any stage of the analysis, technical, strategic and economically sound decisions should be made.On one hand, IOR screening, whether based on technical grounds or 'gut feeling' experience, or better yet on both criteria, leaves a number of possible IOR processes available for evaluation through simulation. Analytical simulation and applicability screening tools are often favored on early stages. However, their crude application could mislead the decision process if results are not carefully interpreted and combined with reservoir engineering expertise and additional evaluation criteria.We propose to combine IOR screening strategies with spatial reservoir information to help to create appropriate sector models as starting point for more detailed evaluations. For this purpose, we couple an analytical simulator/IOR screening tool with a software tool that aids framing the IOR decision-making problem effectively, in the form of influence diagrams. From these diagrams, it is possible to create Tornado Diagrams, Decision Trees and Monte Carlo profiles that assist Reservoir Engineers with the task of properly and rationally framing the decision process, for example with regard to economic risk assessment and NPV analysis associated with IOR.The coupling between both software solutions is proposed in a way that avoids the inflexible monolithic constructions. We illustrate advantages of the proposed approach through a speedy analysis of a publicly available case.

Integration of a Risk-Management Tool and an Analytical Simulator for Assisted Decision-Making in IOR

“…Now, during execution of steps 4 and 6, validation runs should be carried out to choose the better approximation 13 . Well patterns are limited to either a set of one injector and one producer in a 2D section or a 5-spot model in 3D (an approximate extension by using a correlation).…”

“…The way the decision-making and risk management software and the analytical simulator were linked was provided in a previous paper 13 , so we briefly review the linkage. The way the decision-making and risk management software and the analytical simulator were linked was provided in a previous paper 13 , so we briefly review the linkage.…”

Screening and assessing the conditions for effective oil recovery enhancing techniques application for hard to recover high-water cut reserves

“…Известно, что особенности геологического строения залежей нефти во многом определяют эффективность использования той или иной системы разработки [1][2][3][4][5][6]. Эта эффективность определяется технико-экономическими показателями и значениями показателей, характеризующих степень выработки запасов нефти [7][8][9]. Причем, степень влияния геолого-физических свойств пласта, физико-химических свойств пластовых флюидов, условий залегания на степень выработки запасов существенно возрастает в условиях высокообводненных залежей нефти с трудноизвлекаемыми запасами [10][11][12][13][14].…”

Justification of necessity to consider well interference in the process of well

“…Ключевым моментом в решении этой проблемы является определение степени и характера взаимодействия (интерференции) добывающих и нагнетательных скважин [17][18][19][20][21][22].…”