河口采油厂义123-1块属于深层致密砂岩非常规油藏,油藏埋深3384~3757米,平均渗透率1.1 × 10?3 um2,平均孔隙度15.1%,为低孔、特低渗透储层,常规开发效果差,难以实现该块储量的有效动用。针对油藏特点,优化采用长井段水平井裸眼分段压裂工艺为核心,形成一整套致密砂岩非常规油藏开发配套工艺。截止到2013年7月,已完成9口井施工,成功率100%,压裂后全部自喷生产,累产油2.4万吨,实现了非常规油藏义123-1块有效动用,提高了义123-1块采收率。Yi 123-1 block of Hekou Oil Production Plant is a kind of deep tight sandstone unconventional reservoir, which is around 3384 - 3757 meters deep, with an average permeability of 1.1 × 10?3 um2, average porosity of 15.1%. With low porosity and low permeability, this reservoir performs poorly in the conventional development, and is difficult to achieve effective use of the mass storage. In allusion to the characteristics of the reservoir, the long barefoot intervals of horizontal well staged fracturing technology as the core optimization and formed a set of corresponding technology of tight sandstone unconventional reservoir development. By July in 2013, the construction of 9 wells has completed, with the success rate of 100%. All flowing production is done after fracturing; with output of 24,000 tons. It achieves the effective use of Yi 123-1 block, the unconventional reservoir, and improves Yi 123-1 block recovery.
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