E.M. Almukhametova, Ñandidate of Technical Sciences

(Oktyabrskiy Affiliate of Ufa State Petroleum Technological University),

R.R. Varisova (Institute of Energy Resourñes Transportation GUP)

 

APPLICATION OF WELL BOTTOM-HOLE  ZONE TREATMENT FOR BASIC OIL PRODUCTION RESERVES MAINTENANCE AT KOPEY-KUBOVSKY OILFIELD

 

Background

Enhanced oil recovery rate and quality depend on the bottom-hole zone treatment efficiency. This treatment must lead to permeability increase, fluid viscosity decrease, reduction of water flooded areas. The widely used treatment methods are acid treatment, hydraulic fracturing, vibromechanical treatment, bottom-hole zone flashing, thermal-gas-chemical formation treat ment etc.

Aims and Objectives

To analyze the bottom-hole zone treatment methods in the wells No. 12, No. 59, No. 2012 of almost depleted water flooded for 70…98 % Kopey-Kubovskiy oilfield of oil and gas production department Tuymazaneft; to determine the optimal technology.

Objects

Objects under investigation are wells of carbonate reservoir with water cut 45…100 %.

 

Methods

Skin-effect is determined by calculating methods accounting pressure buildup curves and efficiency of treatment.

Results

The work deals with hydrolyzed polyacrylonitrile acid treatment of bottom-hole zone of Kopey-Kubovskiy wells. There are established the optimal treatment technology and estimation of Tournai stage bottom-hole zone treatment efficiency for wells No.12, No. 59, No. 2012.

 

Key words: well, bottom-hole zone, oil flow rate, liguid flow rate, rate of stratum encroachment, hydrochloric acid treatment, hydrolyzed polyacrylonitrile acid treatment.

 

Literature

1. Ibragimov G.Z., Khisamutdinov N.I. Spravochnoye posobiye po primeneniyu khimicheskikh reagentov v dobyche nefti (Reference Book on the Use of Chemical Agents in Oil Production). Moscow: Nedra, 1983. 312 p.

2. Grezina O.A., Yakupov R.F. Opredeleniye proyektnogo tekhnologicheskogo effekta remontnykh rabot v dobyvayushchikh skvazhinakh ekspluatatsionnogo fonda: uchebn.-metod. posobiye (Determination of the Design Technological Effect of Repair Works in the Producing Wells of the Operating Well Stock: Method. Manual). Ufa: UGNTU, 2010. 22 p.

3. Sereda N.G. et all. Sputnik neftyanika i gazovika: spravochnik (Guide-book of Oil and Gas Producers: Reference Book) / N.G. Sereda,

V.A. Sakharov, A.N. Timashev. Moscow: Nedra, 1986. 325 p.

4. Lysenkov A.V. Povysheniye effektivnosti kombinirovannogo solyano-kislotnogo vozdeystviya pri razrabotke obvodnennykh karbonatnykh kollektorov: avtoref. … kand. tekhn. nauk (Improvement of the Effectiveness of Combined Hydrochloride Acid Treatment When Developing Encroached Carbonate Reservoirs: Avtoref. … Candidate of Technical Sciences). Ufa, 2009. 24 p.

5. Tekhnologiya gipanokislotnoy obrabotki karbonatnykh treshchinovato-poristykh kollektorov s vysokoy obvodnennostyyu (Practice of Hydrolyzed Polyacrylonitrile Acid Treatment of Highly Encroached Carbonate Porous Fractured Reservoirs): STP-03-09-2004.

 

The authors

 

• Almukhametova Elvira M., Ñandidate of Technical Sciences

Oktyabrskiy Affiliate of Ufa State Technological Petroleum University

Assistant Professor of Exploration and Exploitation of Oil and Gas Fields Chair

Russian Federation, 452607, Republic of Bashkortostan,

Oktyabrskiy, ul. Devonskaya, 54 a

tel: (34767) 6-60-30

fax: (34767) 6-64-04

e-mail: vsh@of.ugntu.ru

 

• Varisova Raushania R.

Institute of Energy Resourñes Transportation GUP

Attached to Post-Graduate Course

Russian Federation, 450055, Ufa, pr. Oktyabrya, 144/3

tel: (347) 284-38-16

e-mail: vsh@of.ugntu.ru