A method to determine the phase, time, power and direction of oil and gas migration
A technology of oil and gas migration and phases, applied in the field of petroleum geological exploration, can solve problems such as difficult effective phases, time, power and direction of reservoir connectivity
Active Publication Date: 2018-07-24
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
Due to the lack of methods that can obtain a large number of oil inclusion formation temperature or ancient formation water oxygen isotope data, oil inclusion secondary quartz cavity wall oxygen isotope and trace elements, it is still difficult to effectively and systematically reveal the stages and time of oil and gas migration , power and direction, and reservoir connectivity
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Embodiment
[0063] The Shengtuo area in the northern belt of the Dongying Sag is an important oil-producing area in the Jiyang Depression of the Bohai Bay Basin. The stages, time, dynamics and direction of oil and gas migration in the Shengtuo area are important evidences for revealing the distribution of oil and gas in this area, and have a great enlightenment effect on oil and gas exploration in the steep slope belt of faulted basins. Among more than 100 sandy conglomerate samples, 15 pairs of paragenetic oil inclusions and brine inclusions were found. We tested the homogeneous temperature, gas phase percentage and composition of the oil inclusions and brine inclusions in these inclusion pairs, and obtained the phase diagrams and isovolume lines of the oil inclusions and brine inclusions through simulation calculations. The formation temperature and pressure of oil inclusions and brine inclusion pairs, such as figure 1 shown.
[0064] The glutenite in this area is rich in feldspar cla...
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The invention relate to a method for determining a period, the time, power and the direction of oil gas migration. According to the method, according to in situ test data of an oxygen isotope and trace elements of an oil inclusion secondary quartz cavity wall, formation temperature of an oil inclusion and paleo strata water and oxygen isotopes are acquired through calculation, the period and the time of oil gas migration are determined, connectivity of an oil gas migration period reservoir is determined according to the paleo strata water and oxygen isotopes, the oxygen isotope and the trace elements of the oil inclusion secondary quartz cavity wall, paleo fluid pressure during oil gas migration is acquired according to the formation temperature of the oil inclusion, phase diagrams and isochores, in combination with connected sandbody, hydrocarbon source rocks and construction data, power and the direction of oil gas migration are disclosed. The method is advantaged in that through geochemical in-situ testing on the oil inclusion secondary quartz cavity wall, the multi-aspect oil gas migration information can be acquired through calculation, and high accuracy, wide application scope and easy popularization and realization are realized.
Description
technical field [0001] The invention belongs to the technical field of petroleum geological exploration, in particular to a geochemical method for predicting oil and gas distribution, in particular to a method for determining the phase, time, power and direction of oil and gas migration. Background technique [0002] The phase, time, power and direction of oil and gas migration are important information needed for oil and gas exploration. Regarding the stages of migration and accumulation, in the prior art, the stages of oil and gas migration are inferred mainly through test data such as the uniform temperature of brine inclusions and illite dating. The basis is that after oil and gas are injected into the reservoir, it will prevent the growth of minerals. The stagnant growth period of these minerals is regarded as the hydrocarbon charging and migration period. In fact, besides hydrocarbon charging, the reasons for mineral growth and stagnation also include pH value and io...
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IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 张刘平李照阳
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI