STUDYING THE ABNORMAL FORMATION PRESSURE ZONES BY ANALYZING SEISMIC FIELD ATTRIBUTES ON THE EXAMPLE OF WESTERN SIBERIA DEPOSITS
| Autor: | Alexander N. Orekhov, Amani Mangoua Marc M |
|---|---|
| Jazyk: | ruština |
| Rok vydání: | 2020 |
| Předmět: |
seismic attributes
well logging abnormally high formation pressure analysis of amplitude attenuation pseudo-acoustic impedance cube average energy first derivative gilbert transform attribute instantaneous phase instantaneous frequency instantaneous amplitude instantaneous quality Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
| Zdroj: | Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 331, Iss 5, Pp 46-56 (2020) |
| Druh dokumentu: | article |
| ISSN: | 24131830 2500-1019 2413-1830 |
| DOI: | 10.18799/24131830/2020/5/2635 |
| Popis: | Deep wells drilling in many parts of the world, especially in fractured cavernous reservoirs, faces a number of difficulties, both of technical and geological nature such as, the manifestations of abnormally high formation pressure. With the increase in the number of wells withabnormally high formation pressure, and the number of cases of emergency situations, it became absolutely necessary to study this problem in order to prevent negative consequences. The proper study of abnormally high formation pressure started in the late 70-s to the 90-s of the last century.The geological features, patterns, mechanisms for formation of abnormally high formation pressure were studied and various techniques and methods for assessment of reservoir pressures both before and during well drilling were developed. This article analyzes geological information on the development and distribution of abnormal pressures. It is shown that zones of abnormally high formation pressures can be associated with significant changes in the seismic field, that is, seismic attributes. The generalized analysis of presented data allows determining that the zones of abnormally high formation pressure are quite widespread in the sedimentary cover, including in the area of the study. The existing problem of the connection of abnormally high formation pressure with seismic attributes is far from the final solution. A correct forecast of formation pressure assessment makes it possible to conduct drilling in optimal conditions. The task of the prediction of abnormally high formation pressure zones draining reservoir strata in this field is relevant and urgent, since at present it is being drilled through a network of production wells. The aim of the research is the use of seismic attributes to control the development and refinement of a dynamic tank model;identification of abnormally high formation pressurezones in the sections of the hydrocarbon field according to seismic data (seismic attributes). Objects: rocks with a complex structure of the void space due to intense cavernosity and fracturing formed at the expense of tectonic dislocations in the sedimentary cover. Methodology: theoretical and experimental justification of the connection of abnormally high formation pressurezones and seismic data. Results.The authors have constructed the maps of reservoir pressure distribution across the area in the interwell space for gas condensate field under study. |
| Databáze: | Directory of Open Access Journals |
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