Favorable Reservior Predicton Research In Xiashaximiao Formation Of ZZ Area

The research area's structure position is in the valley of northern Sichuan province, According to many years drilling understanding in the North eastern Sichuan province area , unifies the Sichuan basin region deposition research results, the study area of the land facies formation mainly experience three phase of tectonic movements, namely Indo-Chinese epoch, Yanshan epoch, Himalayan epoch, Indo-Chinese mid and late stage is low speed subsidence time; Yanshan epoch is fast subsidence time; Himalayan epoch is the formation arched and denuded time. The terrestrial formaton is well developed. It main performance is the river and the lacustrine facies deposition, The thickness of the deposition is big. But the paper research area's overall exploration and development degree is low, particularly about the land facies Xiashaximiao Formation . So,Based on land facies exploration and development need, my paper will deep research Xiashaximiao Formation of ZZ Area's advantageous reservoir distribution.The paper will forecast the spatial distribution and the crack growth situation of ZZ Area's main reservoir sand, and give the finally advantageous reservoir region, providing for later period's exploration and development.The paper's research assignment is to complete advantageous reservoir forecasting of Xiashaximiao Formation of ZZ Area. It Mainly includes the following research contentes: Reservoir seismic's response characteristic; seismic facies analysis, reservoir sand's plane and spatial distribution research; Reservoir fracture forecast; Advantageous reservoir forecast. Because the sedimentary facies analysis is basic premise of the reservoir lithological character forecasting, therefore use drilling core materials, compound logging materials, electrical curves and so on , all well drillings carries on to the work area in deposits the micro division, the research deposits the micro plane change rule. To carry on the sedimentary facies zonation and reasearch the distribution of sedimentary facies.The non-well area's micro deposition changes is diifficult to control. But the seismic facies analysis may make up the deficience of the pure well's delimitation of sedimentary facies. It technical idea is: the paper taking the well Analysis as the foundation, taking synthetic seismogram demarcating as the bridge, taking the seismic facies analysis as the means, carries on the seismic facies -sedimentary facies analysis. Combinatiing reservoir's fracture spacing, in the advantageous sedimentary facies belt scope, the paper carries on the forecasting of advantageous area's distribution.The paper which taking the Xiashaximiao Formation of ZZ Area as the object of reseach, taking the region deposition survey as the background, taking the representative modes of deposition as the reference, in foundation of analysis and study the log information and the geological information, combining with many kinds of attribute analytic technique, analyses and classifies the sedimentary facies of the interval of interest. Combining with fracture analysis, takes a deep research on reservoir distribution and the evolved characteristic of the Xiashaximiao Formation of ZZ Area.Through the research on favorable reservior of Xiashaximiao Formation of ZZ Area, has made below the main progresses and the understandings :1st. The paper has completed electrofacies analysis of 5 welles in Xiashaximiao Formation of ZZ Area.2nd. Refering to the electrofacies analysis , the paper takes the demarcation of the well and seismic as the foundation to complete the classification of the sedimentary facies of the interval of interest.3rd. Through the representative modes of deposition analysis, the electrofacies analysis, the multiattribute analysis and so on, i believe that Xiashaximiao Formation's main sedimentary facies is the land facies. Rivers, snaking stream and braided river in study area widespread growthed.4th. Combining with fracture analysis, the paper completes the favorable reservior prediction of Xiashaximiao Formation.5th, Concerning the complexity of superimposed channel, the paper uses many kinds of advanced attribute parsing technique to fine carve it in three-dimensional space one by one and to trace it by time evolved , and predictes the thickness using the frequency spectrum decomposition technology .6th. Through this research , the paper seek after the technique to peel the multiperiodic superimposed channel of the continental river facies by using the earthquake attribute technology and the three-dime(?)ional fine carving.Integrates the above methodes, the paper has predicted favorable reservior distribution in Xiashaximiao Formation of ZZ Area.