The Research On The Relationship Between The Well Spacing And Sand In The West Of The Central Area

Single well information is the main data to understanding of reservoir and describing thereservoir, the more well number in a fixed area, the more data is available to us, it isconcluded that the geological understanding is more close to the geological reality. The westor the central area is the first construction block to implement the secondary developmentengineering. There are eight sets of well pattern, its well spacing reached275wells/km2onaverage, that is1.5times than the SZ development zone, the well spacing is the highest inhistory of this area. Such fine dissection of sand was never conducted in history on such highwell spacing, so the geological result of this condition is fine geologic understanding underlimit well spacing therefore the research on sand congruent in different well pattern wasdeveloped, to provide guidance and reference for the future on block sedimentarycharacteristics description. The result can promote the reservoir detail study, its geologicalunderstanding and geological maps will have guidance and demonstration effects.in this paper, it mainly studied the sand coincidence degree with different well patternand sand connecting status with different well space, and under the condition of high-densitywell spacing, a relationship between well spacing and sand control was formed, a typicalsedimentary fancies model was set up, Sa and Pu sedimentary phase graphs were draw Thesecontents have been applied to the adjustment of remaining work on the second type reservoirsof SII-SIII in the west of the central area. The main results were as follows:（1）128sedimentary fancies graphs of the research area were draw under the condition of8kinds oftypical reservoir sand body8sets of well pattern,（2） the types of sand were present andfine reservoir description was completed of this area.（3） sand coincidence degree wasquantitative given in different well spacing.（4） a rule of sand change was set up under thecondition of high well spacing.（5） a set of Sa and Pu sedimentary faces graphs of the westof the central area was draw under the condition of high denity pattern.