Detection of reservoirs from normalized full gradient of gravity anomalies and its application to Shengli oil field, east China

Geophysics ◽  
2002 ◽  
Vol 67 (4) ◽  
pp. 1138-1147 ◽  
Author(s):  
Hualin Zeng ◽  
Xiaohong Meng ◽  
Changli Yao ◽  
Xiaomeng Li ◽  
Hai Lou ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Gravity Anomalies ◽  
Oil Field ◽  
Physical Parameters ◽  
Drilling Data ◽  
Normalized Full Gradient ◽  
High Production ◽  
Centers Of Mass ◽  
Relationship Of ◽  
Gas Bearing

We present how to detect reservoirs by the 3‐D normalized full gradient (NFG) of gravity anomalies constrained by seismic and drilling data. The normalized full gradient represents the full gradient of the gravity anomaly at a point divided by the average of the full gradient at the datum. The closed minima on an NFG map indicate the occurrence and horizontal locations of the centers of mass of density anomalies related to oil reservoirs. This information can be used to select well locations in an oil field. On a cross‐section, the closed minima can be used to estimate the depth to centers of mass of possible hydrocarbon reservoirs. Some characteristics of the NFG are calculated for a hypothetical case of an anticline saturated with oil and gas. The relationship of these characteristics to the geometry and physical parameters of the anticline is studied. Modeling studies show that the NFG largely depends on the number of terms in the Fourier series used to calculate it, and it closely related to the length of the gravity profile or the size of the study area. Applying the NFG method to the Shengli oil field, i.e., using closed minima of NFG alongside drilling data, showed an effectiveness of up to 70%. These results were used to select well locations with the result that some high‐production gas‐bearing strata were discovered by drilling.

scholarly journals CORRELATION RESULTS OF THE PROTEROZOIC-PHANEROZOIC SECTIONS OF THE ALDAN-MAYA OIL AND GAS BEARING REGION ON DEEP DRILLING DATA

2021 ◽  
Vol 2 (1) ◽  
pp. 102-110
Author(s):  
Larisa N. Konstantinova ◽  
Igor A. Gubin ◽  
Sergey A. Moiseev ◽  
Andrey M. Fomin ◽  
Elena N. Kuznetsova
Keyword(s):  
Oil And Gas ◽  
Stratigraphic Correlation ◽  
Controversial Issues ◽  
Well Log ◽  
Deep Drilling ◽  
Seismic Surveys ◽  
Drilling Data ◽  
Core Description ◽  
Gas Bearing

The article discusses the controversial issues of well log correlation of the Riphean, Vendian, Cambrian and Mesozoic sequences, which is prospects for oil and gas within the Aldan-Maya petroleum region. The author's version of the stratigraphic correlation is based on the interpretation of logging data, seismic surveys, core description, archival and published materials. The results obtained can be used for stratigraphic picks correction and structural maps plotting.

scholarly journals Integrating Geochemical Anomaly and Remote Sensing Methods to Predict Oil- and Gas-Bearing Areas in the Yanchang Oil Field, Ordos Basin, China

2019 ◽  
Vol 23 (1) ◽  
pp. 79-86
Author(s):  
Jianming Guo ◽  
Hailong Fan ◽  
Xiangzeng Wang ◽  
Lixia Zhang ◽  
Laiyi Ren ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Oil And Gas ◽  
Ordos Basin ◽  
Mutual Authentication ◽  
Continuous Distribution ◽  
Hyperspectral Remote Sensing ◽  
Oil Field ◽  
Geochemical Data ◽  
Oil Seepage ◽  
Gas Bearing

Oil seepage is one of the most important characteristics of hydrocarbon formation, and understanding oil seepage is crucial for oil-gas exploration and the assessment of petroleum resources. Remote sensing and geochemical methods have the same material and theoretical bases for extracting oil and gas information from underlying strata and the identification of media features. As an emerging exploration method, hyperspectral remote sensing is efficient compared with traditional geochemistry because it is a finer, and sometimes more directly quantitative method for determining the specific mineral anomaly content. Hence, the use of both methods together is important. This paper describes the analysis of hyperspectral remote sensing data and the extraction of abnormal index information, including the level of carbonate alteration and the content of acidolytical hydrocarbons, pyrolysis hydrocarbons, headspace gas, and ferric and ferrous ions. The two methods have mutual authentication, and they are complementary and are useful in oil-bearing areas. When these methods are integrated, the acidolytical hydrocarbon index is the most effective geochemical index and is better at characterizing the oil field distribution than other indices. Also, hydrocarbon geochemical anomalies occurring in oil fields generally show continuous distribution points and are consistent with oil reservoirs. Consequently, a 3D model was established to comprehensively utilize hyperspectral remote sensing and geochemical data to determine the distribution of petroleum reservoirs efficiently as well as to delineate oil- and gas-bearing prospects. There is great potential for determining oil- and gas-bearing fields through the integration of hyperspectral and geochemical data.

scholarly journals О ПРОДУКТИВНОСТИ И ПЕТРОФИЗИЧЕСКИХ ХАРАКТЕРИСТИКАХ КОЛЛЕКТОРОВ СЕВЕРНОЙ ЧАСТИ БАКИНСКОГО АРХИПЕЛАГА

2019 ◽  
Vol 1 (9(39)) ◽  
pp. 21-28
Author(s):  
Мухтарова Х. З. ◽  
Насибова Г. Д.
Keyword(s):  
Physical Properties ◽  
Oil And Gas ◽  
Physical Property ◽  
Geological Structure ◽  
Physical Parameters ◽  
Reservoir Properties ◽  
Natural Laws ◽  
Physical Testing ◽  
The Individual ◽  
Gas Bearing

In the article was showed complex results of petro physical testing sample of rocks from taken digging prospecting-development wells which are widen productive unit sediments of the northern part of the Baku arxipelago. An average values of granulometric composition of rocks of productive unit the above areas by the section have been recount. The matter dependence of permeability from porosity and porosity from depth was solved. The research showed that the same named and the same age rocks physical property change at the result of geological- physical process and getting different prices. The reservoir properties of rocks of productive unit have been learned. The physical properties of rocks of productive unit have been shown in the table. The reservoir properties of different type of rocks which take part in the geological structure of oil and gas bearing areas and their spreading conformity to natural laws are shown in the table.Dependence between physical parameters for the individual kinds of rocks, dependence between physical properties and material structures are established.

scholarly journals HYDROGEODYNAMIC AND HYDROGEOCHEMICAL CONDITIONS OF THE LOWER-MIDDLE JURASSIC COMPLEX IN TALINSKOYE OIL FIELD

2016 ◽  
pp. 6-11
Author(s):  
R. N. Abdrashitova ◽  
R. S. Akzhanov ◽  
E. A. Lukyanenko
Keyword(s):  
Mass Transfer ◽  
Middle Jurassic ◽  
Oil And Gas ◽  
Oil Field ◽  
Reservoir Pressure ◽  
Salt Composition ◽  
Background Value ◽  
Gas Bearing

Hydrogeodynamic and hydrogeochemical conditions of the Lower-Middle Jurassic complex are considered on the example of the oil field Talinskoye located in Krasnoleninsk oil and gas bearing area. The authors describe the complicated structures of the hydrogeodynamic and hydrogeochemical fields in the studied area. It is shown that the deficit reservoir pressure is in average 1.6 MPa. Within the field the zones of the waters ion-salt composition anomalies have been are identified. These zones are characterized by low values of mineralization (in average 5 g/l) as compared to the background value (8 - 9 g/l). The dependence of the hydrogeochemical anomalies formation on the faults position, the temperature of the basement top and the values of reservoir pressures is consistent with the model of the conjugated falling-rising mass transfer.

scholarly journals STUDY OF PROPERTIES OF CORE FROM THE WELLIN WEST-NOVOMOSTOVSK OIL FIELD, KRASNOLENINSK OIL AND GAS BEARING AREA

2016 ◽  
pp. 89-92
Author(s):  
V. V. Majorov ◽  
N. N. Zakirov ◽  
T. V. Yuretskaya ◽  
R. M. Galikeev ◽  
A. F. Semenenko
Keyword(s):  
Electrical Properties ◽  
Laboratory Study ◽  
Oil And Gas ◽  
Oil Field ◽  
Ambient Conditions ◽  
Core Samples ◽  
In Situ Conditions ◽  
Reservoir Conditions ◽  
Gas Bearing

The samples of core from the well in West-Novomostovsk oil field, Krasnoleninsk petroleum bearing area, were analyzed. A complex of core samples petrophysical studies were carried out as well as the laboratory study of capacity and electrical properties of 40 core samples in ambient conditions and in the simulated reservoir conditions. The typical relationships as applied to the in-situ conditions of the studied area wells were obtained.

scholarly journals To the issue of oil and gas potential in the decompression zones of the Dnieper-Donets depression

2021 ◽  
Keyword(s):  
Structural Factor ◽  
Oil And Gas ◽  
Correlation Method ◽  
Oil Field ◽  
Field Pattern ◽  
Geophysical Field ◽  
Northern Side ◽  
Low Efficiency ◽  
Gas Potential ◽  
Gas Bearing

Formulation of the problem. Currently, interest in the foundation as a gas and oil field facility has increased significantly. The low efficiency of oil and gas exploration in the basement rocks is usually explained by the absence of a generally accepted hypothesis about the genesis of oil and gas and as a result of migration and accumulation of hydrocarbons. One of the main factors of accumulation is the presence of decompression zones of the foundation, as potential hydrocarbon traps. The article is devoted to the problem of identifying oil and gas bearing zones of foundation decompression. Analysis of recent research and publications. A number of scientific articles on the composition, age, structure and oil and gas potential of the foundation are analyzed. The first step in identifying decompression zones is to conduct gravimetric and magnetic surveys and apply various techniques to interpret the resulting mathematical model of the wave field pattern in order to localize the sources of its anomalies. Identification of previously unresolved parts of a common problem. In order to save money when conducting prospecting and exploration for oil and gas, the foundation proposes an improvement in the methodology for separating gas-bearing “vaulted” parts of decompression zones. Formation of the purpose of the article. The aim of the work is to establish a seismic pattern of anomalies in the geophysical fields of the base decompression zones. The object of research is the zone of decompression of the foundation on the northern side of the Dnieper-Donets depression. The subject of the study is a seismic drawing of the anomaly of the geophysical field of the gas-bearing zone of decompression of the foundation of the Rozsoshinsk structure. Report of the main material. The article analyzes a few materials to identify areas of base decompaction in various oil and gas regions. It was found that for localization of decompression zones, the Berezkin “singular points” method and the correlation method of separation of geophysical anomalies are most effective. The essence of these methods is a kind of filtering of field anomalies, where against the background of the "structural" factor, one can distinguish the "non-structural factor", i.e. decompression zone. This zone in wave fields (∆g and ∆Т) is fixed by a seismic pattern, where minima are usually fixed over hydrocarbon accumulations in relation to contouring maxima. Based on the results of the application of these methods, the structure-testing ground of the gas-bearing decompression zone is established. As an illustrative example of the successful localization of ∆g and ∆Т, data are presented on modeling the foundation softening zone in one of the oil and gas regions of the northern side of the Dnieper-Donets depression.

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