松辽盆地庆深大型气田的勘探前景

庆深气田是松辽盆地深层发现的地质储量超1×10¹¹m³的大型气田。气层为火山岩和砂砾岩，以岩性气藏、构造-岩性气藏为主，气藏具有气层厚度大、资源丰度高、天然气品质好等3个特点。成藏条件分析表明，断陷地层中发育的高-过成熟暗色泥岩和煤层为大气田形成提供了物质基础； 4个火山岩亚相形成的火山岩体以及砂质含量较高的砾岩层为大气田的形成提供了储集空间；在“下生上储”成藏背景下，断陷内纵向上叠置、横向上错迭连片的各类储层构成了以岩性气藏为主体的多种类型气藏，展示出良好的勘探前景。

EXPLORATION POTENTIAL OF LARGE QINGSHEN GAS FIELD IN THE SONGLIAO BASIN

Qingshen gas field is a large gas field discovered in deeper part of the Songliao Basin with geological reserves over 100 BCM. Volcanic rock and glutenite are the main reservoir rocks and the gas pools are dominated by lithologic and structural-lithologic reservoirs and characterized by large thickness of pay zone, high abundance of gas resources and high quality of gas. According to analysis of reservoiring conditions, the high-post mature dark mudstones and coal beds developed in the fault depression are the material bases for the formation of this large gas field. The volcanic rock complexes composed of 4 volcanic rock subfacies and the glutenite with relatively high content of sand provide the reservoir space for the formation of the large gas field. Under the reservoiring background with source rock underlying reservoir rock, various reservoir rocks vertically superimposed and laterally connected in the fault depression lead to the formation of various gas pools dominated by lithologic gas reservoirs, which have high exploration potentials.