斯伦贝谢水平井随钻测井地质导向技术介绍-推荐.ppt

* * Suppose we want to drill a horizontal well. We can identify the desired part of the reservoir from geological, petrophysical, reservoir information and then define the targets. Then we can design a trajectory to intersect the targets – which is actually geometrical drilling. But is this the right thing to do? Let us see in the next slide. * * 目前的先进钻井技术结合先进地质导向技术，理论上允许我们把水平井段放在油藏的任意位置，使解决层内矛盾尤其是“油上水下”层内矛盾成为可行。 这里是根据一个成功实例做的示意图，上部是泥岩、下部是水层，中间是一个薄油层。 如果按常规的方法打水平井，水平井段一旦进入水层，即使可以重新调整回油层，其有效井段实际上大大减少，同时，也不利于控制油水界面的运移。 运用先进地质导向技术和实时决策，确保井眼轨迹始终沿地层的上边界钻进，从而获得更高的产能和更长的无水产油期。 可以与直井或定向井对比，虽然可以选择性射开油层上部，但油井产能低，而且由于水锥，无水采油期将很短。 * * * 分辨碳酸盐储层类型: 孔洞型储层 裂缝—孔洞型储层 裂缝型储层 * * Here we assume that the layer has constant dip and thus we plan the well. But in reality we see that this is not the case. The reality is much different from the plan. * arcVISION Multiple Depth Resistivity/GR 5-7/8” to 36” hole size geoVISION Laterolog at-bit resistivity/GR/imaging 8-1/4” to 12-1/4” hole sizes adnVISION Density/Neutron/Caliper/Imaging 5-7/8” to 12-1/4” hole size proVISION Magnetic Resonance 8-1/2” hole size sonicVISION Compressional dt 8-1/2” to 17-1/2” hole sizes seismicVISION Seismic While Drilling 8-1/2” to 12-1/4” hole sizes * Real-time dip倾角 calculation in structures构造with an apparent dip视倾角 53 deg Quantitative resistivity up to 20,000 Ohmm, Qualitative up to 200,000 Ohmm欧姆-米 * New High Power Wide Band transmitter: 4-25Khz(新的高能带宽发射器) Stronger formation signal, configurable frequencies to optimize formation coupling. Sonic porosity(更强的地层信号,可兼容频率用于地层耦合,声波空隙度) With wider bandwidth, the Stoneley arrival can be used in faster formations such as carbonates(这种频宽使得stoneley arrival能够用于更快的地层象石灰岩) Fracture width and permeability estimation – Stoneley(断面宽度和渗透性评估) Rock Mechanics properties from measured fast shear(岩石机械特性来自于测得的快速剪切力) * Click through bullets: PowerDrive is the trade name for Schlumberger’s Rotary Steerable System. There are two types of Rotary steerable systems: pu