HOÀN THIỆN GIẾNG VÀ KÍCH THÍCH VỈA WELL

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HOÀN THIỆN GIẾNG VÀ KÍCH THÍCH VỈA WELL HOÀN THIỆN GIẾNG VÀ KÍCH THÍCH VỈA WELL COMPLETION & STIMULATION8/2/2012 Dr. Trần Vũ Tùng 1 Chapter 1 – Fundamental concepts of Well Completions8/2/2012 Dr. Trần Vũ Tùng 2 Objectives To make you all the best completion engineers of the 21st century During the Course – Fundamentals of completion– equipment and completion engineering principles – Basic drilling and completion fluids and applications – Well completion design – Wellsite duties & Computer skills At the end of the course – Understand fundamentals of completion– equipment, completion engineering principles, and applied completion engineering/operations – Be able to prepare simple completion programs.8/2/2012 Dr. Trần Vũ Tùng 3 IntroductionCompletions: – the interface between the reservoir and subsurface production.Role of completion engineers: – to take well that has been drilled and convert it into a safe and efficient production or injection conduit.Completion design requires: – Physics, chemistry, mathematics, engineering, geology, hydraulics, material science and practical hands-on wellsite experience.8/2/2012 Dr. Trần Vũ Tùng 4 Team integration8/2/2012 Dr. Trần Vũ Tùng 5 Basic of Well Completion Engineer8/2/2012 (After Renpu 2011, Advanced well completion engineering) Dr. Trần Vũ Tùng 6 Data sources for completion design Reservoir (P, T, rates…) Project & commercial Rock (timeframes, characteristics profitability, (h, K) drives, license) Drilling Fluids (trajectory, Completion casing, muds, (type, vis., Design density) formation damage) Facilities Expl.& appr. (throughput, P, Wells constraints, (rates, P, s, Q) opportunities) Environment (subsea, land, platform, climate, storms)8/2/2012 Dr. Trần Vũ Tùng 7 Economic influence of completions8/2/2012 Dr. Trần Vũ Tùng 8 Type of reservoir completionsMajor decisions in the reservoir completion are:  Well trajectory and inclination  Open hole vs. cased hole  Sand control requirement and type of sand control  Stimulation (proppant or acid)  Single or multi-zone (commingle or selective)8/2/2012 Dr. Trần Vũ Tùng 9 Reservoir completion methods8/2/2012 Dr. Trần Vũ Tùng 10 Type of upper completions• Major decision in the upper completion are: – Artificial lift and type (gas lift, electrical pump, etc.) – Tubing size – Single or dual completion – Tubing isolation or not (packer or equivalent)8/2/2012 Dr. Trần Vũ Tùng 11 Upper completion methods8/2/2012 Dr. Trần Vũ Tùng 12 Completion design process Statement of Requirements (SOR) Basis of design Completion procedures Post-completion report8/2/2012 Dr. Trần Vũ Tùng 13 Statement of requirements (SOR)• Pulling together the data the will be incorporated into design.• Incorporate reservoir and production data and an expectation of what completion needs to achieve over the life of the field.8/2/2012 Dr. Trần Vũ Tùng 14 Basis of design• Outlines the main decisions made in the completion design and their justification.• Forms the basis designed of reviews by colleagues, internal or external specialists and vendors.• In ...