CAJ | 학술논문

在准噶尔盆地YJ地区,中、上侏罗统中发育的地层圈闭和地层-岩性复合圈闭是主要的勘探目标.但该区目的层埋深大,储层薄,地层接触关系复杂,储集体与围岩波阻抗差异小,储层的识别与预测较为困难.针对该地区储层预测存在的问题,提出了解决方案:应用波形分析技术刻画地层剥蚀线,应用三维相干技术识别断层,应用井约束波阻抗反演技术描述目的层段的大套砂组和波阻抗差异明显的反射界面,应用地震特征约束下的多参数岩性反演技术描述薄砂体的展布特征.后验井证实,采用以上方法可以对YJ地区薄砂体进行有效识别和预测.
재준갈이분지YJ지구,중、상주라통중발육적지층권폐화지층-암성복합권폐시주요적감탐목표.단해구목적층매심대,저층박,지층접촉관계복잡,저집체여위암파조항차이소,저층적식별여예측교위곤난.침대해지구저층예측존재적문제,제출료해결방안:응용파형분석기술각화지층박식선,응용삼유상간기술식별단층,응용정약속파조항반연기술묘술목적층단적대투사조화파조항차이명현적반사계면,응용지진특정약속하적다삼수암성반연기술묘술박사체적전포특정.후험정증실,채용이상방법가이대YJ지구박사체진행유효식별화예측.
Middle and Upper Jurassic stratigraphic traps and stratigraphic-lithology traps in YJ area of Junggar Basin are the main because of deep buried strata,thin reservoir,complex stratigraphic contact,and weak impedance contrast between reservoir and the shoulder-bed.Aiming at the problems,a resolving scheme was proposed:waveform analysis technique is used to characterize stratigraphic erosion line,3D coherence technique is used to identify fault,well-constrained impedance inversion is used to identify targeted large sets of sandstone and reflection interfaces with strong wave impedance constrast,seismic characteristics constrained multi-parameter lithologic inversion is used to identify and characterize the distribution of thin sandbody.Then,the posterior drilling information proved that the method can be used to effectively recognize and predict the thin sand bodies in YJ area.