本文關(guān)鍵詞：套后儲層探測關(guān)鍵技術(shù)研究　出處：《西安石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 套后儲層探測技術(shù) 瞬變電磁法理論 探測模型 參數(shù)校準(zhǔn)

【摘要】：本文所述的套后儲層探測技術(shù)是以瞬變電磁法為理論基礎(chǔ)的一種過套管測電阻率方法。瞬變電磁法作為一種地球物理探測方法,由于其在時(shí)間與空間上的可分性,使得這種方法具有簡單易行,探測信息豐富,精度高等特點(diǎn)。將瞬變電磁法套后儲層技術(shù)應(yīng)用在油田老井中的剩余油探測領(lǐng)域,可以提高油田采收率,節(jié)約測井時(shí)間,降低開發(fā)成本。本文首先介紹了瞬變電磁測井原理,構(gòu)建了套后儲層探測技術(shù)的六層探測模型,計(jì)算出各層介質(zhì)中方向的電場強(qiáng)度與z方向的磁場強(qiáng)度,并給出了套管磁化方法。在設(shè)計(jì)完成信號采集與信號接收電路的基礎(chǔ)上,進(jìn)行影響測井信號因素的研究,通過增加濾波電路,設(shè)置合理的信號分段采樣時(shí)間等方案來提高測量系統(tǒng)的穩(wěn)定性。此外,本文還對溫度測量電路、深度計(jì)數(shù)電路校準(zhǔn)方法進(jìn)行研究.一方面進(jìn)行多組溫度刻度試驗(yàn),選出溫度值與采集數(shù)據(jù)對應(yīng)關(guān)系最優(yōu)的一組數(shù)據(jù),并對其做最小二乘次擬合得到理想的溫度刻度曲線,計(jì)算準(zhǔn)確出溫度計(jì)數(shù)系數(shù);另一方面對深度電路進(jìn)行光電耦合處理,設(shè)計(jì)防抖動電路,選擇計(jì)數(shù)性能最佳的脈沖計(jì)數(shù)芯片,增加自然伽瑪輔助校深電路等方法,得到誤差較小的深度計(jì)數(shù)數(shù)據(jù)。為后期的數(shù)據(jù)解釋提供了較高的真實(shí)性。最后,開展了大量的現(xiàn)場試驗(yàn),通過儀器對比同一口井上提下放時(shí)地層介質(zhì)電動勢趨勢,得出儀器在上提下放測量的一致性,驗(yàn)證深度的準(zhǔn)確性;并通過對比套管井與裸眼井的測量數(shù)據(jù)的一致性來消除接箍與扶震器的對試驗(yàn)數(shù)據(jù)的影響,并得到套后的地層信息;能夠提供較為準(zhǔn)確的生產(chǎn)井分布信息,初步達(dá)到了區(qū)分不同介質(zhì)的目的。
[Abstract]:The technology of reservoir detection in this paper is based on transient electromagnetic method (TEM), which is based on the theory of transient electromagnetic method (TEM), which is used as a geophysical detection method. Because of its separability in time and space, this method is simple and easy to use, and the detection information is abundant. The application of transient electromagnetic method in the field of remaining oil exploration in old wells can improve oil recovery and save logging time. First of all, this paper introduces the transient electromagnetic logging principle, constructs a six-layer detection model of the post-reservoir detection technology, and calculates the electric field intensity in the Chinese direction and the magnetic field intensity in the z direction in each layer of media. The method of casing magnetization is given. Based on the design of signal acquisition and signal receiving circuit, the factors affecting logging signal are studied, and the filter circuit is added. In order to improve the stability of the measurement system, reasonable signal sampling time is set up. In addition, the temperature measurement circuit is also given in this paper. The calibration method of depth counting circuit is studied. On the one hand, multi-group temperature calibration tests are carried out to select a set of data with the best relationship between the temperature value and the collected data. The ideal temperature calibration curve is obtained by least square fitting, and the coefficient of thermometer is calculated accurately. On the other hand, the optoelectronic coupling processing of the depth circuit is carried out, the anti-jitter circuit is designed, the pulse counting chip with the best counting performance is selected, and the natural gamma auxiliary depth correction circuit is added. The depth count data with small error are obtained, which provides a high level of authenticity for the later data interpretation. Finally, a large number of field experiments are carried out. By comparing the trend of electromotive force of formation medium when lifting down in the same well, the consistency of measurement in lifting and downgrading of the instrument is obtained, and the accuracy of depth is verified. By comparing the consistency of measurement data between casing well and open hole, the influence of hoop and vibrator on test data is eliminated, and the formation information after casing is obtained. It can provide more accurate distribution information of production wells and achieve the purpose of distinguishing different media.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE327

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本文編號：1409355