Injection Evaluation and increase of water flooding efficiency in shallow water Gunashli field

Abstract

Azerbaijan has played a significant role in today’s oil and gas history with Baku being one of the birthplaces of the oil and gas industry. The Gunashli field also constitutes an important role in the oil industry of the country, and it is located 120km east of Baku made up of 2 parts, namely the deep water Gunashli (DWG) which is the deep-water section and part of the Azeri-Chirag-Gunashli oilfields, and the western part called shallow water Gunashli (SWG). The shallow water Gunashli is one of the richest fields and is operated by SOCAR with over 170 million tons of oil and gas extracted for over 35 years now. Water injection is an essential part of the development of oil and gas fields. The purpose of the work – The main aim is to enhance and improve the shallow water Gunashli (SWG) fields by waterflooding mainly through injection. For the preparation of this thesis, I based my data and research on the current state of development on the IX, X horizons and FLD where injection is planned for the Gunashli field, the mining indicators of the injection process applied during the development period, the operating facilities processed by the injection process the current conditions and the technical condition of injection wells were investigated. The efficiency of injection and gas injection processes in the shallow Gunashli field was analyzed using a hydrodynamic model. The selection of the optimal option for restoration of the injection system on the IX, X horizons and FLD, where injection is planned, was considered. Thus, the number of locations of new injection wells and the volume of water to be pumped have been determined and the efficiency of the injection method has been evaluated. It was recommended to maintain 7 wells in the working injection fund of the Gunashli field and transfer 11 wells in the operating fund to the injection fund. Thus, as a result of the application of the injection method, 250.97 thousand tons of additional oil is expected to be extracted according to the operational pumping fund, and 1019.85 thousand tons according to the intended pumping fund. The effectiveness of the injection method is economically justified. That is, the price of 1 t of oil: 289.32 man/t (project 118887.7 thousand manats if the price is the decision of the Price Council of SOCAR; If it is 337.0 manat/t (formation of the revenue part of the budget of the Republic) 158628.4 thousand manat, 1 barrel=$60; If it is 635 manat/t (the world price of oil), it is expected to be 407008.2 thousand manat.