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Problems Associated with Study and Prospecting of Tight, Low-Permeability Oil-Source Rocks at License Blocks of Pjsc TatneftNormal access

Authors: R. Khisamov, V. Bazarevskaya and O. Mikhailova
Event name: EAGE/SPE Workshop on Shale Science 2019
Session: Технологии разведки
Publication date: 08 April 2019
DOI: 10.3997/2214-4609.201900461
Organisations: EAGE
Language: Russian
Info: Extended abstract, PDF ( 431.24Kb )
Price: € 20

Summary:
The paper reviews experience of PJSC TATNEFT in studying the domanic sediments – tight, low-permeability oil-source rocks of carbonate deposits. To date, the following results have been obtained: - a series of research activities and subject-related studies have been conducted; - reservoir stimulation technologies and methods are tested and implemented at real field conditions; - nine fields have been included in the State Register in preferential royalty category. In the course of these research efforts, TATNEFT has encountered a number of challenges, which can be divided into two groups – geological and technological. 1) Geological challenges: - deficiency of knowledge from direct study methods; - difficulties associated with mapping decompression zones; - substantial material expenditures required to conduct a set of core studies. 2) Technological problems Currently underway are hydraulic fracturing and hydrochloric acid treatments of potential pay zones identified within the domanic sediments by advanced well logging. Success rate observed during 2014-2018 is 63 %. It has been established that available technologies are not always efficient. Consequently, lessons learned up to date suggest long-term potential and reasonability of activities associated with development of domanic deposits, substantial pilot testing experience has been gained with average success rate of as high as 63 %. However, there are a number of distinct problems related to such activities. Finding solutions to these problems is a critical task for the future years.


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