Based on summering predecessors work, this paper analyses the destroy mechanism of oil and gas reservoirs and their actual examples through the four aspect of uplift and denudation of crust, activity of faults, movement of underground water and gas diffusion. Considers uplift and denudation of crust and activity faults to be the basically cause that oil and gas reservoirs had been distracted uplift of crust and opened faults that can fault to the surface can’t destroy oil and gas reservoirs, but is can cause the secondary distribution of oil and gas. Reduce the scale of original oil and gas reservoirs. The destroy of movement of underground water to oil and gas reservoirs is decided by upiilt and denudation of crust and activity of faults. It can directly destroy oil and gas reservoirs by washing- It can also destroy oil and gas reservoirs by promoting oxidation and bacteria degradation. Gas diffusion makes reserves of gas reservoirs decrease and exhaustion.
Oil field water is coexist with oil and gas in tin-subsurface mineral porosity, and it is an absolutely necessarily composition in each of the reservoir systems. All the time its forming and laws of movement has a close relationship with petroleum generation, migration, acxu mulation and pool forming, preservation, even destruction. Whether distribution of total salinity or Cl ion. there is a good corresponding telween petroleum accumu lalion section and abnormal high values, in particular, as a response pointer indicates petroleum accumulation sec tion. distribution of Cl- ion has a higher resolation Therefore, the study of hydrochemistry field plays a very significant role in petroleum exploration and development.
Petroleum system is an accumulated new con cepuon and method in long period of exploration practice, which emphasizes the analysis of genetic relation between effective hydrocarbon depression and hydrocarbon accumulation. It studies not onlv the .static features of several elements but also their dynamic relation. Yet the conception of complex petroleum system is the application of petroleum system is east oil-bearing basin, China. The technology of fluid inclusions pervades many aspects in petroleum system. The author mainly emphasizes fluid inclusions homogemzation temperature in qualitatively studying petroleum migration passages and direction and periods or stages of petroleum migration and quantitatively studying the depth of petroleum migration.
With the development of the principle and approach of sequence stratigraphy. It could be used in all lypes of strata including marine, non-marine and mixed marine strata. The enhancement of stratigraphic correlation results that sequence stratigraphy can contribute directly to all stages of the exploration and development. Based on the principle of sequence stratigraphy, this article give the sequence stratigraphy framework and reservoir prediction of Paleogene in Bonan uplift, using drilling well, seismic data, core and other data. According to logs data of the region, 20 short-term base-level cycles (SSC and 6 mediate-term base-level cycles(MSC) could he identified in studying region. There are three types of SSC which are low accommodation, middle accommodation and high accommodation and three types of MSC which are progradalion-retrogradation symmetric,progra-dation-retrogradation asymmetric and progradation-ret-rogradation extreme-asymmetric cycles in these cycles.
In this documnel we make the pattern ot mud cone more obvious by deep migration processing 3D data in Da Mintun area. Through a vast amount ol data researching, the author expounds the distribution characteristics; the mud cone in this area is distributed in the form of group, and the arch upward is different, the highest formation reaches later period of Dong Ying Zu. In this document,the author expounds the forming mechanism of mud cone from 5 aspects,thinks the forming of mud cone has direct relationship with the creation 8- elimination of hydrocarbon, and determines the forming time of mud cone. The forming of mud cone results a series of oil & gas reservoir forming around mud cone, including and cline reservoir formed on the upward arch and reservoir formed by means of side seal. There is a remarkable appearance,that is,in the thin sandstone formation in inner side of mud cone,there exists lithologic reservior.Altogether, the mud cone group development in Da Mmtun depression makes the reservoir in I his depression relatively rich,however,because the mud cone group is far away from material source area.so the sandstone is rela tively small,and make it difficult to explore. The exploration in recent years proves that this area is a beneficial place for oil & gas exploration.
Yinggehai basin is a high geotemperature basin that developed at Eogene, and its high geotemperature field and high value of terrestrial heat flow mainly concentrate in the shale piercement belt of central downwarp area in basin. Development and evolution of shale piercement bell and especially upwelling action of hot flow body in late Pliocene epoch are close related with the migration and accumulation of natural gas and especially non-hydrocarbon （CO2）. The local invasion of hot flow body, which is characterized by different layer, block and district, leads the migration and accumulation of hydrocarbon and non-hydrocarbon （CO2） to possess the same characteristics. And the development and evolution of shale pierce merit and upwelling action of hot flow body is the dominant factor which influence the migration, accumulation and reservoir forming of hydrocarbon and especially non hydrocarbon （CO2）. The difference between hydrocarbon and non-hydrocarbon （CO2）on time and channel of migration and accumulation is the main factor which control and constraint the different migration, accumulation and reservoir forming of hydrocarbon and non-hydrocarbon.
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