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玛中2井位于新疆准噶尔盆地玛湖凹陷西南达11井西圈闭玛中平台区,该区地层复杂,具有上部缩径严重,下部易垮塌易漏失的特点。其中,白垩系系、侏罗系泥岩易吸水膨胀,易产生缩径、阻卡。侏罗系八道湾组煤层及砂砾岩地层容易发生井漏。三叠系地层不整合交界面破碎带易垮塌。乌尔禾组褐色泥岩易水化、发生垮塌掉块等引起的阻卡。通过技术攻关,总结出一套该区的优快钻井配套技术,为玛中平台井提速奠定了一定的基础。
Mazhong2 Well is located in the mid-circle fault zone of Mazhong Platform in southwest latitude 11, Mahu Sag, Junggar Basin, Xinjiang. The formation is complex in this area. It has the characteristics of serious shrinkage in the upper part and easy collapse in the lower part. Among them, the Cretaceous, Jurassic mudstone is easily water-swelling, easy to produce reduced diameter, blocking card. The Jurassic Badaowan Formation coal seam and glutenite formation prone to leakage. Triassic unconformity at the interface fracture surface easily collapsed. Wuerhe group of brown mudstone prone to hydration, block collapse caused by blocking the card. Through technical research, summed up a set of excellent drilling in the area supporting technology for the Mazhong platform speed has laid a certain foundation.