�ͳ���¡��ɽ�������ϵ���سɲط�����������

山１井是塔里木石油会战以来巴楚地区第一口突破井，它位于巴楚隆起区鸟山构造东翼低部位上。鸟山构造是一个受两条反向逆冲断层控制的潜山背斜构造，在山１井钻探过程中，奥陶系潜山获良好油气显示，经酸化压裂后，试油结果产气１２３４２９×１０４ｍ３／ｄ，从而发现鸟山构造天然气藏。这一成果为鸟山—玛扎塔格一带寻找奥陶系潜山油气藏提供了借鉴。海西运动使该区受到北西—南东向挤压应力场作用，逆冲断层开始出现，鸟山构造雏形开始形成。喜山运动对该区的影响以造山为特点，“Ｙ”字形断层所挟持的褶皱此时形成。此时源于麦盖提斜坡深处寒武—奥陶系烃源岩的干气，通过不整合面向上运移并沿断层进入奥陶系风化壳中聚集，最终成藏。自山１井以后，在巴楚地区展开了新一轮勘探工作，截至１９９８年１０月底，玛扎塔格构造带上的玛２、３、４、４０１、５井均获工业油气流，勘探成功率１００％。

AN ANALYSIS OF GAS RESERVOIR FORMATION IN ORDOVICIAN IN NIAOSHAN STRUCTURE OF BACHU FAULTED UPLIFT

??Well Shan-1 has been the first breakthrough well since a great battle for oil was lauched by the Talimu Petroleum Headquarters, being located at the lower portion on the eastern flank of Niaoshan structure which is a burial hill anticlinal structure controlled by two antithetic thrusts. During drilling the Well Shan-1,some fair oil-and gas shows had been found in the burial hill of Ordovician and the gas production rate of 12.3429×10⁴m³/d was obtained by testing after acidizing and fracturing, the gas reservoir in Niaoshan structure being found. Such a result can be used for reference for prospecting the burial hill reservoirs in Ordovician in Niaoshan-Mazatage region. During the Hercynian movement, the thrusts and embryonic Niaoshan structure began to be formed because of the effect of northwest-southeast compressional stress field on this region. The effect of the Himalayan movement on this region was shown as orogeny and the fold sandwiched by the "Y"-type fault was formed at this moment.At this time, the dry gas coming from the Cambrian-Ordovician hydrocarbon source rocks in the deep of Maigaiti slope might upward migrate through uncomformity surface and enter into the Ordovician weathering crust along the faults as well as be accumulated to form reservoirs finally. After the well Shan-1 had been successfully drilled, a new round of exploration works were carried out in the Bachu region. By the end of October 1998, the commercial oil-and gas had been obtained from the wells Ma-2,3,4,401,5 drilled in the Mazatage structural belt, exploration success ratio being 100%.