目前对塔中志留系物源的认识仍存在不确定性.利用LA-ICP-MS分析技术对塔里木盆地塔中地区志留系柯坪塔格组2件样品开展碎屑锆石U-Pb年代学研究.结果表明塔中志留系碎屑锆石主要为岩浆结晶成因,锆石年龄主要分布在早古生代460～490 Ma、新元古代760～1000 Ma、古元古代1600～2200 Ma及新太古代晚期-古元古代早期2400～2600 Ma四个时期,其中新元古代760～1000 Ma碎屑锆石年龄占绝对优势(56.8％),峰值～850 Ma.结合志留纪时期塔里木板块南北缘的板块动力学背景,通过盆内构造演化及地貌特征的分析以及和潜在源区锆石年龄的详细对比,确定塔中志留系碎屑锆石主要来源于塔里木盆地西南缘的铁克里克隆起构造带.

断层是引发钻井工程事故,延长钻井周期的一类重要地质原因之一.在钻遇断层破碎带时,极易发生井壁失稳,从而导致井壁垮塌、钻井液漏失、卡钻、甚至钻具断裂等事故的发生.此外,受断层附件地应力不均匀的影响,还会导致井眼轨迹控制难度加大以及套管的剪切变形的发生.因此,准确预测断层的空间位置、并依此优化井轨迹设计,可以有效地避免钻井工程事故的发生,从而缩短钻井周期,降低钻井费用.提出了一种多属性串联断裂预测方法,通过构造导向滤波,相干属性、结构张量以及蚂蚁追踪等属性的联合应用,可准确预测断裂发育位置,从而为钻井工程提供借鉴.该方法在塔里木盆地塔中地区缝洞型碳酸盐岩钻井中取得了很好的效果,断裂预测准确率达到了90.7％,从而很大程度上避免了工程负复杂请况的出现.

The conventional method for flow unit study based only on applied statistics, which neglects the complexity of geological variety, is inaccurate. A new multistep method of determination of flow units is applied in tidal-flat reservoirs in Talimu oilfield. Based on the construction of the high resolution sequence stratigraphic framework, the first step is to differentiate flow barriers from connected sandbodies. Then a clustering sample and a criterion function of different flow units are constructed according to two parameters (FZI and R35 ) and the distribution of flow units. With the results of well partition, a three-dimensional model of flow units was built up under the restriction of connected sandbodies. The example shows that the method of multistep flow unit study can be suitably applied in tidal-flat facies strata.