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白马庙气田蓬莱镇气藏储层致密 ,孔隙结构复杂 ,非均质性强 ,单井产能低 ,研究储层特征和受控因素 ,加强储层改造方是气藏效益开发的出路。储层精细研究揭示 ,气井产能受沉积相和构造条件控制 ;高、中产井与大而厚、物性好的河口坝、河道砂坝沉积微相有关 ,纵向上具很强的层段性 ,主产层集中在Ⅳ～③、Ⅲ～③两套砂组 ,其钻探成功率分别达 82 %和 10 0 % ;平面上多分布于主体构造和东南鼻状突起 ,二者高、中产能井分别占 30 %和 70 %。在深入的地质研究和储层压裂评层选井的基础上 ,采用多层打开、分层压裂、多层合采的方法可提高气井产能 ,并形成了一套行之有效的压裂评层选井的综合配套技术。采用该技术优选出 19口井 ,已实施 5口井全获成功 ,气产量成倍或十几倍增加 ,其中白浅 4 5井气无阻流量高达 18× 10 4m3 /d ,白浅 38井投产 16 5d净增产值 10 0余万元

Study of Gas Well Productivity Control Factor for the Gas Pool of Penglaizhen Formation in Baimamiao Gas Field

??The gas pool of Penglaizhen formation in Baimamiao gas field is of the Characteristics of tight reservoir,complex pore structure,strong heterogeneity and low productivity of a single well.It is a good way to effectively develop the gas pool by studying the reservoir features,control factors and strengthening reservoir transformation.It is revealed that the gas well productivity is controlled by sedimentary facies and structural conditions through meticulously studying the reservoir.High and medium producing wells are related to the sedimentary microfacies of the massive river mouth bar and channel sand bar with favorable physical properties,and the layer series is very outstanding in vertical.The main paies focus on the two sets of sand formations:??????,????;and the success rates of exploratory drilling respectively come up to 82% and 100%.The high and medium producing wells mostly are distributed over the main body structure and southeast structural nose in horizontal,and the high and medium productivity wells of the main body structure and southeast nose arch respectively amount to 30% and 70%.Based on thorough geologic research,reservoir fracturing evaluation and well location selection,the gas well productivity can be enhanced by the methods of multiple layer opening,separate layer fracturing and multiple commingled producing.A set of effective synthetic matching technique for reservoir fracturing evaluation and well location selection is carried out.The 5 of the 19 wells selected by using the technique have been successful,and the gas productions have multiplied several times or over ten times.Among them,the open flow capacity of well Baiqian 45 has come up to 18×10⁴m³/d,and the net increased value of well Baiqian 38 has been over $10×10⁵ yuan during the 165 dags of going into operation.