HOÀN THIỆN GIẾNG VÀ KÍCH THÍCH VỈA WELL

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Ứng dụng công nghệ coiled tubing trong đo log, bắn mở vỉa, xử lý axit và cứu sự cố. 11. Khảo sát ... nghệ khai thác dầu khí bao gồm kỹ thuật hoàn thiện giếng khai thác, công nghệ và kỹ ...... Khaùi nieäm. ❖ Gieáng đa nhaùnh (multilateral well) goàm moät thaân ... gieáng veà sau: laøm saïch, kích thích, kieåm soaùt caùt…

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Nội dung Text: HOÀN THIỆN GIẾNG VÀ KÍCH THÍCH VỈA WELL

HOÀN THIỆN GIẾNG VÀ KÍCH THÍCH VỈA WELL COMPLETION & STIMULATION 8/2/2012 Dr. Trần Vũ Tùng 1
Chapter 1 – Fundamental concepts of Well Completions 8/2/2012 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 integration 8/2/2012 Dr. Trần Vũ Tùng 5
Basic of Well Completion Engineer 8/2/2012 (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 completions 8/2/2012 Dr. Trần Vũ Tùng 8
Type of reservoir completions Major 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 methods 8/2/2012 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 methods 8/2/2012 Dr. Trần Vũ Tùng 12
Completion design process Statement of Requirements (SOR) Basis of design Completion procedures Post-completion report 8/2/2012 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. • Includes the basic installation steps and design risk assessments. • Includes major decisions such as the requirement for sand control, stimulation, tubing size and artificial lift selection. 8/2/2012 Dr. Trần Vũ Tùng 15
Completion procedures • Installation procedures are reviewed and agreed by all parties involved. • Reviews and issuing procedures should precede mobilization of equipment and personnel. 8/2/2012 Dr. Trần Vũ Tùng 16
Post-completion report • Reports well status in detailed. • Reports results and lessons learnt. • Includes a detailed schematic (with serial numbers, equipment specifications, dimensions and depths), a tubing tally, pressure test details and plots, summaries of vendor reports, etc. This document is critical for any engineer planning a later well intervention. 8/2/2012 Dr. Trần Vũ Tùng 17
Responsibilities • DRILLING COMPLETION AND WORKOVER MANAGER – Ensuring the definition of scope of work and requisitioning of drilling and completion/workover contracts are correctly processed by the contracts department and approved first by the District Manager, in order to comply with time schedule, quality and technical conditions as defined in the program. – Ensuring the pre-qualification and technical tender evaluation phases comply with company policies and procedures and to provide the Contracts department with all technical details necessary for a thorough commercial evaluation. – Approving the completions program, ensuring they fully meet the prognosis target, pursuing the best results in terms of safety, time schedule and cost effectiveness. – Managing day-to-day completions operations, co-ordinating the activities of contractors and units/positions involved, in order to guarantee that operations meet the company policies and standards. – Controlling operational costs and provides the technical approval for invoice payment. Verifies the consistency of the expenditure with AFEs and with the administration validity of the contracts. – Liaising, timely and effectively, with the regulatory bodies in order to obtain consent for well related operations. – Instituting, monitoring and reviewing completions safety policies within the Safety Management System, in order to maximize effectiveness and safety of the operations. 8/2/2012 Dr. Trần Vũ Tùng 18
Responsibilities • WELL OPERATIONS SUPERINTENDENT – Ensuring operational progress follows the approved well program and provides technical advice to the rig site on a daily basis, as required. – Ensuring the correct scheduling of completion materials and services, provides a timely supply to the rigs while optimizing the cost of transport, materials and manpower within established program and budgets. – Administering service contracts, providing the technical control of contractor performance giving the first authorization to the payment of invoices and ensuring the control of current total expenditure on each contract. – Ensuring that operations comply with current legislation and company standards. – Preparing scopes of work and technical specification for services to be tendered and review those for services and equipment. – Providing technical advice during pre-qualification and tender evaluation phases, in order to ensure that the selection of contractors and suppliers fully meet technical targets and company standards. – Providing timely and accurate requisitions for all services and materials relevant to well operations. – Ensuring, in liaison with AQS, the correct interface of the Contractor’s procedures are to Company’s policies and procedures. – Ensuring simultaneous completion and production procedures are reviewed. 8/2/2012 Dr. Trần Vũ Tùng 19
Responsibilities • COMPLETION AND WORKOVER ENGINEER – Preparing and reviewing technical specifications and scopes of work for equipment to be tendered and services for completion, workover, wireline and well testing operations. – Co-operating with the Well Operations Superintendent for providing advice during pre-qualification and tender evaluation phases, in order to ensure that the selection of contractors and suppliers fully meet technical targets and company standards. – Supplying well cost estimates for future operations budgets and current operations AFEs, ensuring the reliability of the data provided. – Contributing, in liaison with the Petroleum Engineer and with the Reservoir Engineers, to the planning of development projects, providing technical input to the project teams, in order to optimize cost and effectiveness of the project. – Monitoring, in liaison with the Petroleum Engineer and with the Reservoir Engineers, the performance of wells and reservoirs, in order to provide technical expertise and advice for identifying and initiating enhancements to well potential. – Appraising new completion, workover, wireline and well testing technology and products to determine their application to completion operations, in order to improve time cost performance and safety conditions. – Preparing and reviewing completion, workover, wireline and well testing program and final reports and to ensure the production of adequate feedback about the operations as per the Safety Management System corporate requirements. – Reviewing daily the operations versus the program, providing a thorough investigation of operational times. – Providing engineering assistance to the Well Operations Superintendent in the follow up of operations. – Providing reports and analysis on the operated and non-operated activities for presentation, meetings and reporting to the management and to ensure the operational feedback reporting system is consistent with Company and corporate requirements. – Assisting his supervisor in contacts with partners and regulatory bodies providing the necessary documentation and reports. – Providing the monthly updates on the variance between actual and estimated expenditures for each job center for each class of cost, also to liaise with the Completion/Workover Superintendent, in order to update the expenditure on each contract. – Ensuring the production and review of the Completions Procedure Manual in order to comply with company policies and 8/2/2012 the current legislation. Dr. Trần Vũ Tùng 20