Integration of Pressure Transient Tests in Fracture Characterization in North Kuwait Carbonate Reservoirs
| Autor: | X. LeVarlet, E. Van der Steen, Chinmaya Pattnaik, R. Narhari, Sadok Lamine, Qasem Dashti, P. Richard |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Petroleum engineering
02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences Characterization (materials science) chemistry.chemical_compound 020401 chemical engineering chemistry Fracture (geology) Carbonate Geotechnical engineering Transient (oscillation) 0204 chemical engineering Geology 0105 earth and related environmental sciences |
| Zdroj: | Day 3 Wed, November 15, 2017. |
| DOI: | 10.2118/188835-ms |
| Popis: | The North Kuwait Carbonate (NKJG) reservoirs are currently under development by KOC (Kuwait Oil Company). In addition to the matrix heterogeneity, natural fracturing poses extra challenges for the optimization of the field development planning. The presence of open, connected fractures presents opportunities for infill drilling but increases the risk of water invasion and drilling related issues. Numerous fracture modelling studies have been supporting both appraisal and development strategies of the fields. The translation of the field observation and detailed fracture characterization using static BHI (bore hole image) and core data yields a series of geological concepts. These concepts capture end members of the spatial distribution of the major conductive features and provide a range of realizations for the geometrical extent of the fracture zones. Given the large uncertainty in the dynamic properties of the fracture; pressure transient analysis (PTA), complemented by core data, has proven to be key in narrowing the range of fracture equivalent permeabilities and porosities that are carried forward in the history matching step. This paper focuses on illustrating the integration of different aspects of Pressure Transient Analysis data to pre-condition the discrete fracture network (DFN) model realizations. Comparison between KH from well test and log data allows to discriminate fractured from matrix wells. Dedicated sector models around fractured wells are built to assess the impact of the matrix, faults and fracture properties on the transient pressure response. Numerical simulations are conducted directly on the static model with the fractures explicitly captured as discrete surface features. For each DFN configuration, a sensitivity analysis of the fracture properties is performed and the characteristics of the resulting pressure derivatives are then compared against the well test data to select the plausible realizations that honor both geological and flow data. In this paper, a series of examples demonstrating the application of the methodology are presented for different areas of the field. |
| Databáze: | OpenAIRE |
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