延969井区山西组气藏特征及开发响应特征

Gas Reservoir Characteristics and Development Response Characteristics of Shanxi Formation in Yan969 Well Area

延969井区位于陕西省靖边县东南部,该区山西组气藏储量规模占比大、产量规模占比小。研究从地层地质特征、气藏地质特征方面分析,明确了储量大、产量小的原因。根据分析原因,提出山西组气藏开发有3个思路:一是当其他层段有单层达到工业气流时,山西组物性较差的薄气层可本着"顺手牵羊"的思路开发,作为主力气层产量的辅助与补充;二是多个薄气层存在时,合层的产量具有工业价值时也可开发;三是重视储层改造技术与成本之间的平衡,当经济性提升大于储层改造成本时,也可开发这些薄气层来提升区块的整体经济效益。

The Yan969 well area is located in the southeast of Jingbian county.The gas reservoirs of the Shanxi formation in this area account for a large proportion of the gas reservoirs and a small proportion of the production scale.The study analyzed the geological characteristics of the strata and gas reservoirs and clarif ied the reasons for the large reserves and small production.According to the analysis reasons,three ideas for the development of gas reservoirs in the Shanxi formation are proposed.First,when there is a single layer in other intervals to reach the industrial gas flow,the thin gas reservoirs with poor physical properties in the Shanxi formation can be developed based on the idea of“taking the sheep”as the main force.The second is that when there are multiple thin gas layers,the output of the combined layer can also be developed when it has industrial value.The third is to pay attention to the balance between reservoir reconstruction technology and cost.When the economic improvement is greater than the cost of reservoir reconstruction,these thin gas layers can also be developed to improve the overall economic benef its of the block.