| The block of Leng41 is a massively thick edge-bottom water and super heavy oil reservoir,the structureofit located in north-central of steep slope belt of Lengdong faulted anticlinal beltfrom the east of the western sag of liaohe rifted basin,the east is the central upliftand,west is Lengxi,north is the block of Leng 42,south is the block of Leng 115.The structural area of the block is 9.7k㎡.The Main oil layer of the reservoir is S32,the proven oil area of the block is 2.3k㎡,in 2004 wedouble calculated the oil geological reserves are 2189*104t.As the capacity building and the overall development of the blockyear by year,the pressureof the reservoirin the main parts significantly decreased,a variety of development contradictions like the reservoir with bottom water coning influenced development results and the fuzziness of replacing the block capacity,broughtthe overall development of the block a larger and largerinfluence.In order to decide the way of replacing the capacity,to accelerate the block transformation of the development mode,to improve the recovery efficiency,to stabilize the production of the block.This study based on the exquisitely geologic research,from the perspective of the development effect and the distributionof the remaining oil,integratelyuseing reservoir geologic modeling、numerical simulation and other technical means,doing the comprehensive research of S32 segment in Leng41 block.Based on the results from this research and the injection-production technology about the thermal recovery of heavy oil,making a design of the steam flooding pilot test in this block,confirming the feasibility of steam flooding technology which applied in this block.The success of the pilot test in this block is the key to expand the scale of the testand turn to large-scale drive in the future,there is a great significance for stabling the production,improving the block recovery efficiency and improving the development effect and economic benefit. |
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