All tight gas project appraisals are inherently dependent upon the ability to execute effective fracturing treatments; that allow the determination of sustainable production rates; and hence potential project economics. Unlike the North American tight gas business, where thousands of wellbores are drilled each year and operational infrastructure and service quality is proven and in place; the International gas market challenges are significantly different. Often, the key risk with international appraisal; is not the presence of the hydrocarbons themselves, but more likely a competent and efficient execution of the fracturing process; that is essential in order to maximize gas inflow performance required for optimum well productivity.

The Khazzan-Makarem structures have substantial known hydrocarbon reserves; which to date have resisted an economic development. The unique reservoir challenges of these formations have been shown to require specialised operational, execution and technical expertise in order to be successfully appraised. The approach taken by the operator was to design the appraisal project with particular emphasis on the application of massive hydraulic fracturing treatments; as without successful stimulation, it was appreciated that the ability to evaluate well productivity and hence the development potential would remain elusive.

The result of close cooperation between the operator and the service providers, included planning the stimulation strategy, the number/sequence of wells, well types, fracture design, development of a matrix and selection criteria for technology deployment as well as operational issues associated with individual treatment execution. A locally tailored and carefully planned workflow was developed, that addressed the fracturing design process, the impact on the service delivery and the overall performance of this extensive project.

Information presented within this paper, will provide a complete understanding of the specific factors involved in tight gas stimulation (particularly in remote areas). Furthermore, it will demonstrate a methodical approach to the process of planning, execution, QA/QC and post treatment assessment.

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